generic: fold yaffs_cvs_2009_04_24 patch to generic/files

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34012 3c298f89-4303-0410-b956-a3cf2f4a3e73

33 files changed, 3152 insertions, 2824 deletions

diff --git a/target/linux/generic/files/fs/yaffs2/Kconfig b/target/linux/generic/files/fs/yaffs2/Kconfig
index 7b6f836cd..c0e545b64 100644
--- a/target/linux/generic/files/fs/yaffs2/Kconfig
+++ b/target/linux/generic/files/fs/yaffs2/Kconfig
@@ -5,7 +5,7 @@
 config YAFFS_FS
 	tristate "YAFFS2 file system support"
 	default n
-	depends on MTD
+	depends on MTD_BLOCK
 	select YAFFS_YAFFS1
 	select YAFFS_YAFFS2
 	help
@@ -43,7 +43,8 @@ config YAFFS_9BYTE_TAGS
 	  format that you need to continue to support.  New data written
 	  also uses the older-style format.  Note: Use of this option
 	  generally requires that MTD's oob layout be adjusted to use the
-	  older-style format.  See notes on tags formats and MTD versions.
+	  older-style format.  See notes on tags formats and MTD versions
+	  in yaffs_mtdif1.c.
 
 	  If unsure, say N.
 
@@ -109,26 +110,6 @@ config YAFFS_DISABLE_LAZY_LOAD
 
 	  If unsure, say N.
 
-config YAFFS_CHECKPOINT_RESERVED_BLOCKS
-	int "Reserved blocks for checkpointing"
-	depends on YAFFS_YAFFS2
-	default 10
-	help
-          Give the number of Blocks to reserve for checkpointing.
-	  Checkpointing saves the state at unmount so that mounting is
-	  much faster as a scan of all the flash to regenerate this state
-	  is not needed.  These Blocks are reserved per partition, so if
-	  you have very small partitions the default (10) may be a mess
-	  for you.  You can set this value to 0, but that does not mean
-	  checkpointing is disabled at all. There only won't be any
-	  specially reserved blocks for checkpointing, so if there is
-	  enough free space on the filesystem, it will be used for
-	  checkpointing.
-
-	  If unsure, leave at default (10), but don't wonder if there are
-	  always 2MB used on your large page device partition (10 x 2k
-	  pagesize). When using small partitions or when being very small
-	  on space, you probably want to set this to zero.
 
 config YAFFS_DISABLE_WIDE_TNODES
 	bool "Turn off wide tnodes"
diff --git a/target/linux/generic/files/fs/yaffs2/Makefile b/target/linux/generic/files/fs/yaffs2/Makefile
index 73f46583f..382ee6142 100644
--- a/target/linux/generic/files/fs/yaffs2/Makefile
+++ b/target/linux/generic/files/fs/yaffs2/Makefile
@@ -5,7 +5,6 @@
 obj-$(CONFIG_YAFFS_FS) += yaffs.o
 
 yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
-yaffs-y += yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
+yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
 yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
-yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o
-yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
+yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
diff --git a/target/linux/generic/files/fs/yaffs2/NOTE.openwrt b/target/linux/generic/files/fs/yaffs2/NOTE.openwrt
new file mode 100644
index 000000000..fe1049d8a
--- /dev/null
+++ b/target/linux/generic/files/fs/yaffs2/NOTE.openwrt
@@ -0,0 +1,4 @@
+The yaffs2 source has been fetched from the yaffs2 CVS tree.
+
+URL: cvs.aleph1.co.uk
+Version: 2009-09-24
diff --git a/target/linux/generic/files/fs/yaffs2/devextras.h b/target/linux/generic/files/fs/yaffs2/devextras.h
index fcf2690a5..7df46dc29 100644
--- a/target/linux/generic/files/fs/yaffs2/devextras.h
+++ b/target/linux/generic/files/fs/yaffs2/devextras.h
@@ -14,194 +14,135 @@
  */
 
 /*
- * This file is just holds extra declarations used during development.
- * Most of these are from kernel includes placed here so we can use them in
- * applications.
+ * This file is just holds extra declarations of macros that would normally
+ * be providesd in the Linux kernel. These macros have been written from
+ * scratch but are functionally equivalent to the Linux ones.
  *
  */
 
 #ifndef __EXTRAS_H__
 #define __EXTRAS_H__
 
-#if defined WIN32
-#define __inline__ __inline
-#define new newHack
-#endif
-
-#if !(defined __KERNEL__) || (defined WIN32)
 
-/* User space defines */
+#if !(defined __KERNEL__)
 
+/* Definition of types */
 typedef unsigned char __u8;
 typedef unsigned short __u16;
 typedef unsigned __u32;
 
+#endif
+
 /*
- * Simple doubly linked list implementation.
- *
- * Some of the internal functions ("__xxx") are useful when
- * manipulating whole lists rather than single entries, as
- * sometimes we already know the next/prev entries and we can
- * generate better code by using them directly rather than
- * using the generic single-entry routines.
+ * This is a simple doubly linked list implementation that matches the
+ * way the Linux kernel doubly linked list implementation works.
  */
 
-#define prefetch(x) 1
-
-struct list_head {
-	struct list_head *next, *prev;
+struct ylist_head {
+	struct ylist_head *next; /* next in chain */
+	struct ylist_head *prev; /* previous in chain */
 };
 
-#define LIST_HEAD_INIT(name) { &(name), &(name) }
 
-#define LIST_HEAD(name) \
-	struct list_head name = LIST_HEAD_INIT(name)
+/* Initialise a static list */
+#define YLIST_HEAD(name) \
+struct ylist_head name = { &(name), &(name)}
+
 
-#define INIT_LIST_HEAD(ptr) do { \
-	(ptr)->next = (ptr); (ptr)->prev = (ptr); \
+
+/* Initialise a list head to an empty list */
+#define YINIT_LIST_HEAD(p) \
+do { \
+	(p)->next = (p);\
+	(p)->prev = (p); \
 } while (0)
 
-/*
- * Insert a new entry between two known consecutive entries.
- *
- * This is only for internal list manipulation where we know
- * the prev/next entries already!
- */
-static __inline__ void __list_add(struct list_head *new,
-				  struct list_head *prev,
-				  struct list_head *next)
-{
-	next->prev = new;
-	new->next = next;
-	new->prev = prev;
-	prev->next = new;
-}
 
-/**
- * list_add - add a new entry
- * @new: new entry to be added
- * @head: list head to add it after
- *
- * Insert a new entry after the specified head.
- * This is good for implementing stacks.
- */
-static __inline__ void list_add(struct list_head *new, struct list_head *head)
+/* Add an element to a list */
+static __inline__ void ylist_add(struct ylist_head *newEntry,
+				struct ylist_head *list)
 {
-	__list_add(new, head, head->next);
-}
+	struct ylist_head *listNext = list->next;
+
+	list->next = newEntry;
+	newEntry->prev = list;
+	newEntry->next = listNext;
+	listNext->prev = newEntry;
 
-/**
- * list_add_tail - add a new entry
- * @new: new entry to be added
- * @head: list head to add it before
- *
- * Insert a new entry before the specified head.
- * This is useful for implementing queues.
- */
-static __inline__ void list_add_tail(struct list_head *new,
-				     struct list_head *head)
-{
-	__list_add(new, head->prev, head);
 }
 
-/*
- * Delete a list entry by making the prev/next entries
- * point to each other.
- *
- * This is only for internal list manipulation where we know
- * the prev/next entries already!
- */
-static __inline__ void __list_del(struct list_head *prev,
-				  struct list_head *next)
+static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
+				 struct ylist_head *list)
 {
-	next->prev = prev;
-	prev->next = next;
+	struct ylist_head *listPrev = list->prev;
+
+	list->prev = newEntry;
+	newEntry->next = list;
+	newEntry->prev = listPrev;
+	listPrev->next = newEntry;
+
 }
 
-/**
- * list_del - deletes entry from list.
- * @entry: the element to delete from the list.
- * Note: list_empty on entry does not return true after this, the entry is
- * in an undefined state.
- */
-static __inline__ void list_del(struct list_head *entry)
+
+/* Take an element out of its current list, with or without
+ * reinitialising the links.of the entry*/
+static __inline__ void ylist_del(struct ylist_head *entry)
 {
-	__list_del(entry->prev, entry->next);
+	struct ylist_head *listNext = entry->next;
+	struct ylist_head *listPrev = entry->prev;
+
+	listNext->prev = listPrev;
+	listPrev->next = listNext;
+
 }
 
-/**
- * list_del_init - deletes entry from list and reinitialize it.
- * @entry: the element to delete from the list.
- */
-static __inline__ void list_del_init(struct list_head *entry)
+static __inline__ void ylist_del_init(struct ylist_head *entry)
 {
-	__list_del(entry->prev, entry->next);
-	INIT_LIST_HEAD(entry);
+	ylist_del(entry);
+	entry->next = entry->prev = entry;
 }
 
-/**
- * list_empty - tests whether a list is empty
- * @head: the list to test.
- */
-static __inline__ int list_empty(struct list_head *head)
+
+/* Test if the list is empty */
+static __inline__ int ylist_empty(struct ylist_head *entry)
 {
-	return head->next == head;
+	return (entry->next == entry);
 }
 
-/**
- * list_splice - join two lists
- * @list: the new list to add.
- * @head: the place to add it in the first list.
+
+/* ylist_entry takes a pointer to a list entry and offsets it to that
+ * we can find a pointer to the object it is embedded in.
  */
-static __inline__ void list_splice(struct list_head *list,
-				   struct list_head *head)
-{
-	struct list_head *first = list->next;
 
-	if (first != list) {
-		struct list_head *last = list->prev;
-		struct list_head *at = head->next;
 
-		first->prev = head;
-		head->next = first;
+#define ylist_entry(entry, type, member) \
+	((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
 
-		last->next = at;
-		at->prev = last;
-	}
-}
 
-/**
- * list_entry - get the struct for this entry
- * @ptr:	the &struct list_head pointer.
- * @type:	the type of the struct this is embedded in.
- * @member:	the name of the list_struct within the struct.
+/* ylist_for_each and list_for_each_safe  iterate over lists.
+ * ylist_for_each_safe uses temporary storage to make the list delete safe
  */
-#define list_entry(ptr, type, member) \
-	((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
 
-/**
- * list_for_each	-	iterate over a list
- * @pos:	the &struct list_head to use as a loop counter.
- * @head:	the head for your list.
- */
-#define list_for_each(pos, head) \
-	for (pos = (head)->next, prefetch(pos->next); pos != (head); \
-        	pos = pos->next, prefetch(pos->next))
-
-/**
- * list_for_each_safe	-	iterate over a list safe against removal
- *                              of list entry
- * @pos:	the &struct list_head to use as a loop counter.
- * @n:		another &struct list_head to use as temporary storage
- * @head:	the head for your list.
- */
-#define list_for_each_safe(pos, n, head) \
-	for (pos = (head)->next, n = pos->next; pos != (head); \
-		pos = n, n = pos->next)
+#define ylist_for_each(itervar, list) \
+	for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
+
+#define ylist_for_each_safe(itervar, saveVar, list) \
+	for (itervar = (list)->next, saveVar = (list)->next->next; \
+		itervar != (list); itervar = saveVar, saveVar = saveVar->next)
+
+
+#if !(defined __KERNEL__)
+
+
+#ifndef WIN32
+#include <sys/stat.h>
+#endif
+
+
+#ifdef CONFIG_YAFFS_PROVIDE_DEFS
+/* File types */
+
 
-/*
- * File types
- */
 #define DT_UNKNOWN	0
 #define DT_FIFO		1
 #define DT_CHR		2
@@ -212,6 +153,7 @@ static __inline__ void list_splice(struct list_head *list,
 #define DT_SOCK		12
 #define DT_WHT		14
 
+
 #ifndef WIN32
 #include <sys/stat.h>
 #endif
@@ -227,10 +169,6 @@ static __inline__ void list_splice(struct list_head *list,
 #define ATTR_ATIME	16
 #define ATTR_MTIME	32
 #define ATTR_CTIME	64
-#define ATTR_ATIME_SET	128
-#define ATTR_MTIME_SET	256
-#define ATTR_FORCE	512	/* Not a change, but a change it */
-#define ATTR_ATTR_FLAG	1024
 
 struct iattr {
 	unsigned int ia_valid;
@@ -244,21 +182,15 @@ struct iattr {
 	unsigned int ia_attr_flags;
 };
 
-#define KERN_DEBUG
+#endif
 
 #else
 
-#ifndef WIN32
 #include <linux/types.h>
-#include <linux/list.h>
 #include <linux/fs.h>
 #include <linux/stat.h>
-#endif
 
 #endif
 
-#if defined WIN32
-#undef new
-#endif
 
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/moduleconfig.h b/target/linux/generic/files/fs/yaffs2/moduleconfig.h
index 016391ca5..a344baf37 100644
--- a/target/linux/generic/files/fs/yaffs2/moduleconfig.h
+++ b/target/linux/generic/files/fs/yaffs2/moduleconfig.h
@@ -27,12 +27,12 @@
 
 /* Default: Not selected */
 /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
-//#define CONFIG_YAFFS_DOES_ECC
+/* #define CONFIG_YAFFS_DOES_ECC */
 
 /* Default: Not selected */
 /* Meaning: ECC byte order is 'wrong'.  Only meaningful if */
 /*          CONFIG_YAFFS_DOES_ECC is set */
-//#define CONFIG_YAFFS_ECC_WRONG_ORDER
+/* #define CONFIG_YAFFS_ECC_WRONG_ORDER */
 
 /* Default: Selected */
 /* Meaning: Disables testing whether chunks are erased before writing to them*/
@@ -54,11 +54,11 @@ that you need to continue to support.  New data written also uses the
 older-style format.
 Note: Use of this option generally requires that MTD's oob layout be
 adjusted to use the older-style format.  See notes on tags formats and
-MTD versions.
+MTD versions in yaffs_mtdif1.c.
 */
 /* Default: Not selected */
 /* Meaning: Use older-style on-NAND data format with pageStatus byte */
-#define CONFIG_YAFFS_9BYTE_TAGS
+/* #define CONFIG_YAFFS_9BYTE_TAGS */
 
 #endif /* YAFFS_OUT_OF_TREE */
 
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.c b/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.c
index 933a33fb8..40d792366 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.c
@@ -12,48 +12,43 @@
  */
 
 const char *yaffs_checkptrw_c_version =
-    "$Id: yaffs_checkptrw.c,v 1.14 2007-05-15 20:07:40 charles Exp $";
+	"$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
 
 
 #include "yaffs_checkptrw.h"
-
+#include "yaffs_getblockinfo.h"
 
 static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
 {
-
 	int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
 
 	T(YAFFS_TRACE_CHECKPOINT,
 		(TSTR("checkpt blocks available = %d" TENDSTR),
 		blocksAvailable));
 
-
 	return (blocksAvailable <= 0) ? 0 : 1;
 }
 
 
 static int yaffs_CheckpointErase(yaffs_Device *dev)
 {
-
 	int i;
 
-
-	if(!dev->eraseBlockInNAND)
+	if (!dev->eraseBlockInNAND)
 		return 0;
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR),
-		dev->internalStartBlock,dev->internalEndBlock));
-
-	for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
-		if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){
-			T(YAFFS_TRACE_CHECKPOINT,(TSTR("erasing checkpt block %d"TENDSTR),i));
-			if(dev->eraseBlockInNAND(dev,i- dev->blockOffset /* realign */)){
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
+		dev->internalStartBlock, dev->internalEndBlock));
+
+	for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+		if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
+			T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
+			if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
 				bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
 				dev->nErasedBlocks++;
 				dev->nFreeChunks += dev->nChunksPerBlock;
-			}
-			else {
-				dev->markNANDBlockBad(dev,i);
+			} else {
+				dev->markNANDBlockBad(dev, i);
 				bi->blockState = YAFFS_BLOCK_STATE_DEAD;
 			}
 		}
@@ -71,23 +66,23 @@ static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
 	int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
 	T(YAFFS_TRACE_CHECKPOINT,
 		(TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
-		dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock));
+		dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
 
-	if(dev->checkpointNextBlock >= 0 &&
-	   dev->checkpointNextBlock <= dev->internalEndBlock &&
-	   blocksAvailable > 0){
+	if (dev->checkpointNextBlock >= 0 &&
+			dev->checkpointNextBlock <= dev->internalEndBlock &&
+			blocksAvailable > 0) {
 
-		for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){
-			yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
-			if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){
+		for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
+			yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+			if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
 				dev->checkpointNextBlock = i + 1;
 				dev->checkpointCurrentBlock = i;
-				T(YAFFS_TRACE_CHECKPOINT,(TSTR("allocating checkpt block %d"TENDSTR),i));
+				T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i));
 				return;
 			}
 		}
 	}
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR)));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR)));
 
 	dev->checkpointNextBlock = -1;
 	dev->checkpointCurrentBlock = -1;
@@ -98,30 +93,31 @@ static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
 	int  i;
 	yaffs_ExtendedTags tags;
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start:  blocks %d next %d" TENDSTR),
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start:  blocks %d next %d" TENDSTR),
 		dev->blocksInCheckpoint, dev->checkpointNextBlock));
 
-	if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
-		for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){
+	if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
+		for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
 			int chunk = i * dev->nChunksPerBlock;
 			int realignedChunk = chunk - dev->chunkOffset;
 
-			dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags);
-			T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
-				i, tags.objectId,tags.sequenceNumber,tags.eccResult));
+			dev->readChunkWithTagsFromNAND(dev, realignedChunk,
+					NULL, &tags);
+			T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
+				i, tags.objectId, tags.sequenceNumber, tags.eccResult));
 
-			if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){
+			if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
 				/* Right kind of block */
 				dev->checkpointNextBlock = tags.objectId;
 				dev->checkpointCurrentBlock = i;
 				dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
 				dev->blocksInCheckpoint++;
-				T(YAFFS_TRACE_CHECKPOINT,(TSTR("found checkpt block %d"TENDSTR),i));
+				T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i));
 				return;
 			}
 		}
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("found no more checkpt blocks"TENDSTR)));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR)));
 
 	dev->checkpointNextBlock = -1;
 	dev->checkpointCurrentBlock = -1;
@@ -133,17 +129,17 @@ int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
 
 	/* Got the functions we need? */
 	if (!dev->writeChunkWithTagsToNAND ||
-	    !dev->readChunkWithTagsFromNAND ||
-	    !dev->eraseBlockInNAND ||
-	    !dev->markNANDBlockBad)
+			!dev->readChunkWithTagsFromNAND ||
+			!dev->eraseBlockInNAND ||
+			!dev->markNANDBlockBad)
 		return 0;
 
-	if(forWriting && !yaffs_CheckpointSpaceOk(dev))
+	if (forWriting && !yaffs_CheckpointSpaceOk(dev))
 		return 0;
 
-	if(!dev->checkpointBuffer)
-		dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk);
-	if(!dev->checkpointBuffer)
+	if (!dev->checkpointBuffer)
+		dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
+	if (!dev->checkpointBuffer)
 		return 0;
 
 
@@ -159,12 +155,10 @@ int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
 	dev->checkpointNextBlock = dev->internalStartBlock;
 
 	/* Erase all the blocks in the checkpoint area */
-	if(forWriting){
-		memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk);
+	if (forWriting) {
+		memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
 		dev->checkpointByteOffset = 0;
 		return yaffs_CheckpointErase(dev);
-
-
 	} else {
 		int i;
 		/* Set to a value that will kick off a read */
@@ -174,7 +168,7 @@ int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
 		dev->blocksInCheckpoint = 0;
 		dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
 		dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
-		for(i = 0; i < dev->checkpointMaxBlocks; i++)
+		for (i = 0; i < dev->checkpointMaxBlocks; i++)
 			dev->checkpointBlockList[i] = -1;
 	}
 
@@ -191,18 +185,17 @@ int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
 
 static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
 {
-
 	int chunk;
 	int realignedChunk;
 
 	yaffs_ExtendedTags tags;
 
-	if(dev->checkpointCurrentBlock < 0){
+	if (dev->checkpointCurrentBlock < 0) {
 		yaffs_CheckpointFindNextErasedBlock(dev);
 		dev->checkpointCurrentChunk = 0;
 	}
 
-	if(dev->checkpointCurrentBlock < 0)
+	if (dev->checkpointCurrentBlock < 0)
 		return 0;
 
 	tags.chunkDeleted = 0;
@@ -210,10 +203,10 @@ static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
 	tags.chunkId = dev->checkpointPageSequence + 1;
 	tags.sequenceNumber =  YAFFS_SEQUENCE_CHECKPOINT_DATA;
 	tags.byteCount = dev->nDataBytesPerChunk;
-	if(dev->checkpointCurrentChunk == 0){
+	if (dev->checkpointCurrentChunk == 0) {
 		/* First chunk we write for the block? Set block state to
 		   checkpoint */
-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointCurrentBlock);
+		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock);
 		bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
 		dev->blocksInCheckpoint++;
 	}
@@ -221,28 +214,29 @@ static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
 	chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
 
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
-		chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
+		chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk, tags.objectId, tags.chunkId));
 
 	realignedChunk = chunk - dev->chunkOffset;
 
-	dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags);
+	dev->writeChunkWithTagsToNAND(dev, realignedChunk,
+			dev->checkpointBuffer, &tags);
 	dev->checkpointByteOffset = 0;
 	dev->checkpointPageSequence++;
 	dev->checkpointCurrentChunk++;
-	if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){
+	if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
 		dev->checkpointCurrentChunk = 0;
 		dev->checkpointCurrentBlock = -1;
 	}
-	memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk);
+	memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
 
 	return 1;
 }
 
 
-int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes)
+int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
 {
-	int i=0;
+	int i = 0;
 	int ok = 1;
 
 
@@ -250,17 +244,14 @@ int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes)
 
 
 
-	if(!dev->checkpointBuffer)
+	if (!dev->checkpointBuffer)
 		return 0;
 
-	if(!dev->checkpointOpenForWrite)
+	if (!dev->checkpointOpenForWrite)
 		return -1;
 
-	while(i < nBytes && ok) {
-
-
-
-		dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ;
+	while (i < nBytes && ok) {
+		dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes;
 		dev->checkpointSum += *dataBytes;
 		dev->checkpointXor ^= *dataBytes;
 
@@ -270,18 +261,17 @@ int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes)
 		dev->checkpointByteCount++;
 
 
-		if(dev->checkpointByteOffset < 0 ||
+		if (dev->checkpointByteOffset < 0 ||
 		   dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
 			ok = yaffs_CheckpointFlushBuffer(dev);
-
 	}
 
-	return 	i;
+	return i;
 }
 
 int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
 {
-	int i=0;
+	int i = 0;
 	int ok = 1;
 	yaffs_ExtendedTags tags;
 
@@ -291,52 +281,54 @@ int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
 
 	__u8 *dataBytes = (__u8 *)data;
 
-	if(!dev->checkpointBuffer)
+	if (!dev->checkpointBuffer)
 		return 0;
 
-	if(dev->checkpointOpenForWrite)
+	if (dev->checkpointOpenForWrite)
 		return -1;
 
-	while(i < nBytes && ok) {
+	while (i < nBytes && ok) {
 
 
-		if(dev->checkpointByteOffset < 0 ||
-		   dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
+		if (dev->checkpointByteOffset < 0 ||
+			dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
 
-		   	if(dev->checkpointCurrentBlock < 0){
+			if (dev->checkpointCurrentBlock < 0) {
 				yaffs_CheckpointFindNextCheckpointBlock(dev);
 				dev->checkpointCurrentChunk = 0;
 			}
 
-			if(dev->checkpointCurrentBlock < 0)
+			if (dev->checkpointCurrentBlock < 0)
 				ok = 0;
 			else {
-
-				chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock +
-				          dev->checkpointCurrentChunk;
+				chunk = dev->checkpointCurrentBlock *
+					dev->nChunksPerBlock +
+					dev->checkpointCurrentChunk;
 
 				realignedChunk = chunk - dev->chunkOffset;
 
-	   			/* read in the next chunk */
-	   			/* printf("read checkpoint page %d\n",dev->checkpointPage); */
-				dev->readChunkWithTagsFromNAND(dev, realignedChunk,
-							       dev->checkpointBuffer,
-							      &tags);
+				/* read in the next chunk */
+				/* printf("read checkpoint page %d\n",dev->checkpointPage); */
+				dev->readChunkWithTagsFromNAND(dev,
+						realignedChunk,
+						dev->checkpointBuffer,
+						&tags);
 
-				if(tags.chunkId != (dev->checkpointPageSequence + 1) ||
-				   tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
-				   ok = 0;
+				if (tags.chunkId != (dev->checkpointPageSequence + 1) ||
+					tags.eccResult > YAFFS_ECC_RESULT_FIXED ||
+					tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
+					ok = 0;
 
 				dev->checkpointByteOffset = 0;
 				dev->checkpointPageSequence++;
 				dev->checkpointCurrentChunk++;
 
-				if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
+				if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
 					dev->checkpointCurrentBlock = -1;
 			}
 		}
 
-		if(ok){
+		if (ok) {
 			*dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
 			dev->checkpointSum += *dataBytes;
 			dev->checkpointXor ^= *dataBytes;
@@ -353,17 +345,17 @@ int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
 int yaffs_CheckpointClose(yaffs_Device *dev)
 {
 
-	if(dev->checkpointOpenForWrite){
-		if(dev->checkpointByteOffset != 0)
+	if (dev->checkpointOpenForWrite) {
+		if (dev->checkpointByteOffset != 0)
 			yaffs_CheckpointFlushBuffer(dev);
 	} else {
 		int i;
-		for(i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++){
-			yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointBlockList[i]);
-			if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
+		for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
+			yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
+			if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
 				bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
 			else {
-				// Todo this looks odd...
+				/* Todo this looks odd... */
 			}
 		}
 		YFREE(dev->checkpointBlockList);
@@ -374,27 +366,25 @@ int yaffs_CheckpointClose(yaffs_Device *dev)
 	dev->nErasedBlocks -= dev->blocksInCheckpoint;
 
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR),
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR),
 			dev->checkpointByteCount));
 
-	if(dev->checkpointBuffer){
+	if (dev->checkpointBuffer) {
 		/* free the buffer */
 		YFREE(dev->checkpointBuffer);
 		dev->checkpointBuffer = NULL;
 		return 1;
-	}
-	else
+	} else
 		return 0;
-
 }
 
 int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
 {
 	/* Erase the first checksum block */
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint invalidate"TENDSTR)));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
 
-	if(!yaffs_CheckpointSpaceOk(dev))
+	if (!yaffs_CheckpointSpaceOk(dev))
 		return 0;
 
 	return yaffs_CheckpointErase(dev);
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.h b/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.h
index d3ff17405..5d426ea8d 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_checkptrw.h
@@ -20,9 +20,9 @@
 
 int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
 
-int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes);
+int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
 
-int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes);
+int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
 
 int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
 
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_ecc.c b/target/linux/generic/files/fs/yaffs2/yaffs_ecc.c
index e2860393d..d037e90a2 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_ecc.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_ecc.c
@@ -29,7 +29,7 @@
  */
 
 const char *yaffs_ecc_c_version =
-    "$Id: yaffs_ecc.c,v 1.9 2007-02-14 01:09:06 wookey Exp $";
+	"$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $";
 
 #include "yportenv.h"
 
@@ -109,12 +109,10 @@ void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc)
 		b = column_parity_table[*data++];
 		col_parity ^= b;
 
-		if (b & 0x01)	// odd number of bits in the byte
-		{
+		if (b & 0x01) {		/* odd number of bits in the byte */
 			line_parity ^= i;
 			line_parity_prime ^= ~i;
 		}
-
 	}
 
 	ecc[2] = (~col_parity) | 0x03;
@@ -158,7 +156,7 @@ void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc)
 	ecc[0] = ~t;
 
 #ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
-	// Swap the bytes into the wrong order
+	/* Swap the bytes into the wrong order */
 	t = ecc[0];
 	ecc[0] = ecc[1];
 	ecc[1] = t;
@@ -189,7 +187,7 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
 		unsigned bit;
 
 #ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
-		// swap the bytes to correct for the wrong order
+		/* swap the bytes to correct for the wrong order */
 		unsigned char t;
 
 		t = d0;
@@ -251,7 +249,7 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
  * ECCxxxOther does ECC calcs on arbitrary n bytes of data
  */
 void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
-			     yaffs_ECCOther * eccOther)
+				yaffs_ECCOther *eccOther)
 {
 	unsigned int i;
 
@@ -278,8 +276,8 @@ void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
 }
 
 int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
-			  yaffs_ECCOther * read_ecc,
-			  const yaffs_ECCOther * test_ecc)
+			yaffs_ECCOther *read_ecc,
+			const yaffs_ECCOther *test_ecc)
 {
 	unsigned char cDelta;	/* column parity delta */
 	unsigned lDelta;	/* line parity delta */
@@ -294,8 +292,7 @@ int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
 		return 0; /* no error */
 
 	if (lDelta == ~lDeltaPrime &&
-	    (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15))
-	{
+	    (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) {
 		/* Single bit (recoverable) error in data */
 
 		bit = 0;
@@ -307,7 +304,7 @@ int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
 		if (cDelta & 0x02)
 			bit |= 0x01;
 
-		if(lDelta >= nBytes)
+		if (lDelta >= nBytes)
 			return -1;
 
 		data[lDelta] ^= (1 << bit);
@@ -316,7 +313,7 @@ int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
 	}
 
 	if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) +
-	     yaffs_CountBits(cDelta)) == 1) {
+			yaffs_CountBits(cDelta)) == 1) {
 		/* Reccoverable error in ecc */
 
 		*read_ecc = *test_ecc;
@@ -326,6 +323,4 @@ int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
 	/* Unrecoverable error */
 
 	return -1;
-
 }
-
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_ecc.h b/target/linux/generic/files/fs/yaffs2/yaffs_ecc.h
index 79bc3d117..60765176e 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_ecc.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_ecc.h
@@ -13,15 +13,15 @@
  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  */
 
- /*
-  * This code implements the ECC algorithm used in SmartMedia.
-  *
-  * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-  * The two unused bit are set to 1.
-  * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
-  * blocks are used on a 512-byte NAND page.
-  *
-  */
+/*
+ * This code implements the ECC algorithm used in SmartMedia.
+ *
+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
+ * The two unused bit are set to 1.
+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
+ * blocks are used on a 512-byte NAND page.
+ *
+ */
 
 #ifndef __YAFFS_ECC_H__
 #define __YAFFS_ECC_H__
@@ -34,11 +34,11 @@ typedef struct {
 
 void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc);
 int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
-		     const unsigned char *test_ecc);
+		const unsigned char *test_ecc);
 
 void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
-			     yaffs_ECCOther * ecc);
+			yaffs_ECCOther *ecc);
 int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
-			  yaffs_ECCOther * read_ecc,
-			  const yaffs_ECCOther * test_ecc);
+			yaffs_ECCOther *read_ecc,
+			const yaffs_ECCOther *test_ecc);
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_fs.c b/target/linux/generic/files/fs/yaffs2/yaffs_fs.c
index 67001b10e..7c04ed3a3 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_fs.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_fs.c
@@ -1,7 +1,7 @@
 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2009 Aleph One Ltd.
  *   for Toby Churchill Ltd and Brightstar Engineering
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
@@ -32,18 +32,17 @@
  */
 
 const char *yaffs_fs_c_version =
-    "$Id: yaffs_fs.c,v 1.63 2007-09-19 20:35:40 imcd Exp $";
+    "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $";
 extern const char *yaffs_guts_c_version;
 
 #include <linux/version.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
 #include <linux/config.h>
 #endif
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
-#include <linux/list.h>
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/smp_lock.h>
@@ -53,10 +52,12 @@ extern const char *yaffs_guts_c_version;
 #include <linux/string.h>
 #include <linux/ctype.h>
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#include "asm/div64.h"
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 
 #include <linux/statfs.h>	/* Added NCB 15-8-2003 */
-#include <asm/statfs.h>
+#include <linux/statfs.h>
 #define UnlockPage(p) unlock_page(p)
 #define Page_Uptodate(page)	test_bit(PG_uptodate, &(page)->flags)
 
@@ -69,22 +70,45 @@ extern const char *yaffs_guts_c_version;
 #define	BDEVNAME_SIZE		0
 #define	yaffs_devname(sb, buf)	kdevname(sb->s_dev)
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
 /* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
 #define __user
 #endif
 
 #endif
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+#define YPROC_ROOT  (&proc_root)
+#else
+#define YPROC_ROOT  NULL
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 #define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) (mtd)->writesize
+#define WRITE_SIZE(mtd) ((mtd)->writesize)
 #else
 #define WRITE_SIZE_STR "oobblock"
-#define WRITE_SIZE(mtd) (mtd)->oobblock
+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
+#define YAFFS_USE_WRITE_BEGIN_END 1
+#else
+#define YAFFS_USE_WRITE_BEGIN_END 0
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+{
+	uint64_t result = partition_size;
+	do_div(result, block_size);
+	return (uint32_t)result;
+}
+#else
+#define YCALCBLOCKS(s, b) ((s)/(b))
 #endif
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "yportenv.h"
 #include "yaffs_guts.h"
@@ -96,28 +120,44 @@ extern const char *yaffs_guts_c_version;
 
 unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
 unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+unsigned int yaffs_auto_checkpoint = 1;
 
 /* Module Parameters */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-module_param(yaffs_traceMask,uint,0644);
-module_param(yaffs_wr_attempts,uint,0644);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+module_param(yaffs_traceMask, uint, 0644);
+module_param(yaffs_wr_attempts, uint, 0644);
+module_param(yaffs_auto_checkpoint, uint, 0644);
 #else
-MODULE_PARM(yaffs_traceMask,"i");
-MODULE_PARM(yaffs_wr_attempts,"i");
+MODULE_PARM(yaffs_traceMask, "i");
+MODULE_PARM(yaffs_wr_attempts, "i");
+MODULE_PARM(yaffs_auto_checkpoint, "i");
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+/* use iget and read_inode */
+#define Y_IGET(sb, inum) iget((sb), (inum))
+static void yaffs_read_inode(struct inode *inode);
+
+#else
+/* Call local equivalent */
+#define YAFFS_USE_OWN_IGET
+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
+
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
 #endif
 
 /*#define T(x) printk x */
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
-#define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
 #else
-#define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
+#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
 #endif
 
 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 #define yaffs_SuperToDevice(sb)	((yaffs_Device *)sb->s_fs_info)
 #else
 #define yaffs_SuperToDevice(sb)	((yaffs_Device *)sb->u.generic_sbp)
@@ -126,47 +166,49 @@ MODULE_PARM(yaffs_wr_attempts,"i");
 static void yaffs_put_super(struct super_block *sb);
 
 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-				loff_t * pos);
+				loff_t *pos);
+static ssize_t yaffs_hold_space(struct file *f);
+static void yaffs_release_space(struct file *f);
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_file_flush(struct file *file, fl_owner_t id);
 #else
 static int yaffs_file_flush(struct file *file);
 #endif
 
 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
-			     int datasync);
+				int datasync);
 
 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
 			struct nameidata *n);
 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-				   struct nameidata *n);
+					struct nameidata *n);
 #else
 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
 #endif
 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-		      struct dentry *dentry);
+			struct dentry *dentry);
 static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-			 const char *symname);
+			const char *symname);
 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-		       dev_t dev);
+			dev_t dev);
 #else
 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-		       int dev);
+			int dev);
 #endif
 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			struct inode *new_dir, struct dentry *new_dentry);
 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_sync_fs(struct super_block *sb, int wait);
 static void yaffs_write_super(struct super_block *sb);
 #else
@@ -174,33 +216,47 @@ static int yaffs_sync_fs(struct super_block *sb);
 static int yaffs_write_super(struct super_block *sb);
 #endif
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
 #else
 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
 #endif
-static void yaffs_read_inode(struct inode *inode);
 
+#ifdef YAFFS_HAS_PUT_INODE
 static void yaffs_put_inode(struct inode *inode);
+#endif
+
 static void yaffs_delete_inode(struct inode *);
 static void yaffs_clear_inode(struct inode *);
 
 static int yaffs_readpage(struct file *file, struct page *page);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
 #else
 static int yaffs_writepage(struct page *page);
 #endif
+
+
+#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+				loff_t pos, unsigned len, unsigned flags,
+				struct page **pagep, void **fsdata);
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+				loff_t pos, unsigned len, unsigned copied,
+				struct page *pg, void *fsdadata);
+#else
 static int yaffs_prepare_write(struct file *f, struct page *pg,
-			       unsigned offset, unsigned to);
+				unsigned offset, unsigned to);
 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
-			      unsigned to);
+				unsigned to);
 
-static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
-			  int buflen);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+#endif
+
+static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+				int buflen);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
 #else
 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
@@ -209,12 +265,17 @@ static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
 static struct address_space_operations yaffs_file_address_operations = {
 	.readpage = yaffs_readpage,
 	.writepage = yaffs_writepage,
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+	.write_begin = yaffs_write_begin,
+	.write_end = yaffs_write_end,
+#else
 	.prepare_write = yaffs_prepare_write,
 	.commit_write = yaffs_commit_write,
+#endif
 };
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
-static struct file_operations yaffs_file_operations = {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+static const struct file_operations yaffs_file_operations = {
 	.read = do_sync_read,
 	.write = do_sync_write,
 	.aio_read = generic_file_aio_read,
@@ -224,11 +285,12 @@ static struct file_operations yaffs_file_operations = {
 	.fsync = yaffs_sync_object,
 	.splice_read = generic_file_splice_read,
 	.splice_write = generic_file_splice_write,
+	.llseek = generic_file_llseek,
 };
 
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
 
-static struct file_operations yaffs_file_operations = {
+static const struct file_operations yaffs_file_operations = {
 	.read = do_sync_read,
 	.write = do_sync_write,
 	.aio_read = generic_file_aio_read,
@@ -241,29 +303,29 @@ static struct file_operations yaffs_file_operations = {
 
 #else
 
-static struct file_operations yaffs_file_operations = {
+static const struct file_operations yaffs_file_operations = {
 	.read = generic_file_read,
 	.write = generic_file_write,
 	.mmap = generic_file_mmap,
 	.flush = yaffs_file_flush,
 	.fsync = yaffs_sync_object,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 	.sendfile = generic_file_sendfile,
 #endif
 };
 #endif
 
-static struct inode_operations yaffs_file_inode_operations = {
+static const struct inode_operations yaffs_file_inode_operations = {
 	.setattr = yaffs_setattr,
 };
 
-static struct inode_operations yaffs_symlink_inode_operations = {
+static const struct inode_operations yaffs_symlink_inode_operations = {
 	.readlink = yaffs_readlink,
 	.follow_link = yaffs_follow_link,
 	.setattr = yaffs_setattr,
 };
 
-static struct inode_operations yaffs_dir_inode_operations = {
+static const struct inode_operations yaffs_dir_inode_operations = {
 	.create = yaffs_create,
 	.lookup = yaffs_lookup,
 	.link = yaffs_link,
@@ -276,16 +338,21 @@ static struct inode_operations yaffs_dir_inode_operations = {
 	.setattr = yaffs_setattr,
 };
 
-static struct file_operations yaffs_dir_operations = {
+static const struct file_operations yaffs_dir_operations = {
 	.read = generic_read_dir,
 	.readdir = yaffs_readdir,
 	.fsync = yaffs_sync_object,
 };
 
-static struct super_operations yaffs_super_ops = {
+static const struct super_operations yaffs_super_ops = {
 	.statfs = yaffs_statfs,
+
+#ifndef YAFFS_USE_OWN_IGET
 	.read_inode = yaffs_read_inode,
+#endif
+#ifdef YAFFS_HAS_PUT_INODE
 	.put_inode = yaffs_put_inode,
+#endif
 	.put_super = yaffs_put_super,
 	.delete_inode = yaffs_delete_inode,
 	.clear_inode = yaffs_clear_inode,
@@ -293,22 +360,21 @@ static struct super_operations yaffs_super_ops = {
 	.write_super = yaffs_write_super,
 };
 
-static void yaffs_GrossLock(yaffs_Device * dev)
+static void yaffs_GrossLock(yaffs_Device *dev)
 {
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
-
+	T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
 	down(&dev->grossLock);
+	T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
 }
 
-static void yaffs_GrossUnlock(yaffs_Device * dev)
+static void yaffs_GrossUnlock(yaffs_Device *dev)
 {
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
+	T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
 	up(&dev->grossLock);
-
 }
 
-static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
-			  int buflen)
+static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+			int buflen)
 {
 	unsigned char *alias;
 	int ret;
@@ -329,7 +395,7 @@ static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
 	return ret;
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
 #else
 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
@@ -345,32 +411,31 @@ static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
 
 	yaffs_GrossUnlock(dev);
 
-	if (!alias)
-        {
+	if (!alias) {
 		ret = -ENOMEM;
 		goto out;
-        }
+	}
 
 	ret = vfs_follow_link(nd, alias);
 	kfree(alias);
 out:
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
-	return ERR_PTR (ret);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+	return ERR_PTR(ret);
 #else
 	return ret;
 #endif
 }
 
 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-			      yaffs_Object * obj);
+				yaffs_Object *obj);
 
 /*
  * Lookup is used to find objects in the fs
  */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 
 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-				   struct nameidata *n)
+				struct nameidata *n)
 #else
 static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 #endif
@@ -383,12 +448,11 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 	yaffs_GrossLock(dev);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_lookup for %d:%s\n",
-	   yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
+		("yaffs_lookup for %d:%s\n",
+		yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
 
-	obj =
-	    yaffs_FindObjectByName(yaffs_InodeToObject(dir),
-				   dentry->d_name.name);
+	obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
+					dentry->d_name.name);
 
 	obj = yaffs_GetEquivalentObject(obj);	/* in case it was a hardlink */
 
@@ -397,13 +461,13 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 
 	if (obj) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
+			("yaffs_lookup found %d\n", obj->objectId));
 
 		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
 
 		if (inode) {
 			T(YAFFS_TRACE_OS,
-			  (KERN_DEBUG "yaffs_loookup dentry \n"));
+				("yaffs_loookup dentry \n"));
 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
  * d_add even if NULL inode */
 #if 0
@@ -416,7 +480,7 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 		}
 
 	} else {
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
+		T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
 
 	}
 
@@ -425,20 +489,22 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 	d_add(dentry, inode);
 
 	return NULL;
-	/*      return (ERR_PTR(-EIO)); */
-
 }
 
+
+#ifdef YAFFS_HAS_PUT_INODE
+
 /* For now put inode is just for debugging
  * Put inode is called when the inode **structure** is put.
  */
 static void yaffs_put_inode(struct inode *inode)
 {
 	T(YAFFS_TRACE_OS,
-	  ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
-	   atomic_read(&inode->i_count)));
+		("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
+		atomic_read(&inode->i_count)));
 
 }
+#endif
 
 /* clear is called to tell the fs to release any per-inode data it holds */
 static void yaffs_clear_inode(struct inode *inode)
@@ -449,9 +515,9 @@ static void yaffs_clear_inode(struct inode *inode)
 	obj = yaffs_InodeToObject(inode);
 
 	T(YAFFS_TRACE_OS,
-	  ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
-	   atomic_read(&inode->i_count),
-	   obj ? "object exists" : "null object"));
+		("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+		atomic_read(&inode->i_count),
+		obj ? "object exists" : "null object"));
 
 	if (obj) {
 		dev = obj->myDev;
@@ -486,23 +552,23 @@ static void yaffs_delete_inode(struct inode *inode)
 	yaffs_Device *dev;
 
 	T(YAFFS_TRACE_OS,
-	  ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
-	   atomic_read(&inode->i_count),
-	   obj ? "object exists" : "null object"));
+		("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+		atomic_read(&inode->i_count),
+		obj ? "object exists" : "null object"));
 
 	if (obj) {
 		dev = obj->myDev;
 		yaffs_GrossLock(dev);
-		yaffs_DeleteFile(obj);
+		yaffs_DeleteObject(obj);
 		yaffs_GrossUnlock(dev);
 	}
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
-        truncate_inode_pages (&inode->i_data, 0);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+	truncate_inode_pages(&inode->i_data, 0);
 #endif
 	clear_inode(inode);
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_file_flush(struct file *file, fl_owner_t id)
 #else
 static int yaffs_file_flush(struct file *file)
@@ -513,8 +579,8 @@ static int yaffs_file_flush(struct file *file)
 	yaffs_Device *dev = obj->myDev;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_file_flush object %d (%s)\n", obj->objectId,
-	   obj->dirty ? "dirty" : "clean"));
+		("yaffs_file_flush object %d (%s)\n", obj->objectId,
+		obj->dirty ? "dirty" : "clean"));
 
 	yaffs_GrossLock(dev);
 
@@ -535,15 +601,15 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 
 	yaffs_Device *dev;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage at %08x, size %08x\n",
-			   (unsigned)(pg->index << PAGE_CACHE_SHIFT),
-			   (unsigned)PAGE_CACHE_SIZE));
+	T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
+			(unsigned)(pg->index << PAGE_CACHE_SHIFT),
+			(unsigned)PAGE_CACHE_SIZE));
 
 	obj = yaffs_DentryToObject(f->f_dentry);
 
 	dev = obj->myDev;
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 	BUG_ON(!PageLocked(pg));
 #else
 	if (!PageLocked(pg))
@@ -555,9 +621,9 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 
 	yaffs_GrossLock(dev);
 
-	ret =
-	    yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT,
-				   PAGE_CACHE_SIZE);
+	ret = yaffs_ReadDataFromFile(obj, pg_buf,
+				pg->index << PAGE_CACHE_SHIFT,
+				PAGE_CACHE_SIZE);
 
 	yaffs_GrossUnlock(dev);
 
@@ -575,7 +641,7 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 	flush_dcache_page(pg);
 	kunmap(pg);
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_readpage done\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
 	return ret;
 }
 
@@ -593,7 +659,7 @@ static int yaffs_readpage(struct file *f, struct page *pg)
 
 /* writepage inspired by/stolen from smbfs */
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
 #else
 static int yaffs_writepage(struct page *page)
@@ -616,12 +682,11 @@ static int yaffs_writepage(struct page *page)
 
 	if (offset > inode->i_size) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
-		   "yaffs_writepage at %08x, inode size = %08x!!!\n",
-		   (unsigned)(page->index << PAGE_CACHE_SHIFT),
-		   (unsigned)inode->i_size));
+			("yaffs_writepage at %08x, inode size = %08x!!!\n",
+			(unsigned)(page->index << PAGE_CACHE_SHIFT),
+			(unsigned)inode->i_size));
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "                -> don't care!!\n"));
+			("                -> don't care!!\n"));
 		unlock_page(page);
 		return 0;
 	}
@@ -629,11 +694,10 @@ static int yaffs_writepage(struct page *page)
 	end_index = inode->i_size >> PAGE_CACHE_SHIFT;
 
 	/* easy case */
-	if (page->index < end_index) {
+	if (page->index < end_index)
 		nBytes = PAGE_CACHE_SIZE;
-	} else {
+	else
 		nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
-	}
 
 	get_page(page);
 
@@ -643,19 +707,18 @@ static int yaffs_writepage(struct page *page)
 	yaffs_GrossLock(obj->myDev);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
-	   (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+		("yaffs_writepage at %08x, size %08x\n",
+		(unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
-	   (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+		("writepag0: obj = %05x, ino = %05x\n",
+		(int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
 
-	nWritten =
-	    yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
-				  nBytes, 0);
+	nWritten = yaffs_WriteDataToFile(obj, buffer,
+			page->index << PAGE_CACHE_SHIFT, nBytes, 0);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
-	   (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+		("writepag1: obj = %05x, ino = %05x\n",
+		(int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
 
 	yaffs_GrossUnlock(obj->myDev);
 
@@ -667,100 +730,207 @@ static int yaffs_writepage(struct page *page)
 	return (nWritten == nBytes) ? 0 : -ENOSPC;
 }
 
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+				loff_t pos, unsigned len, unsigned flags,
+				struct page **pagep, void **fsdata)
+{
+	struct page *pg = NULL;
+	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+	uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
+	uint32_t to = offset + len;
+
+	int ret = 0;
+	int space_held = 0;
+
+	T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
+	/* Get a page */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
+	pg = grab_cache_page_write_begin(mapping, index, flags);
+#else
+	pg = __grab_cache_page(mapping, index);
+#endif
+
+	*pagep = pg;
+	if (!pg) {
+		ret =  -ENOMEM;
+		goto out;
+	}
+	/* Get fs space */
+	space_held = yaffs_hold_space(filp);
+
+	if (!space_held) {
+		ret = -ENOSPC;
+		goto out;
+	}
+
+	/* Update page if required */
+
+	if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+		ret = yaffs_readpage_nolock(filp, pg);
+
+	if (ret)
+		goto out;
+
+	/* Happy path return */
+	T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
+
+	return 0;
+
+out:
+	T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
+	if (space_held)
+		yaffs_release_space(filp);
+	if (pg) {
+		unlock_page(pg);
+		page_cache_release(pg);
+	}
+	return ret;
+}
+
+#else
+
 static int yaffs_prepare_write(struct file *f, struct page *pg,
-			       unsigned offset, unsigned to)
+				unsigned offset, unsigned to)
 {
+	T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_prepair_write\n"));
 	if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
 		return yaffs_readpage_nolock(f, pg);
-
 	return 0;
+}
+#endif
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+				loff_t pos, unsigned len, unsigned copied,
+				struct page *pg, void *fsdadata)
+{
+	int ret = 0;
+	void *addr, *kva;
+	uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+
+	kva = kmap(pg);
+	addr = kva + offset_into_page;
+
+	T(YAFFS_TRACE_OS,
+		("yaffs_write_end addr %x pos %x nBytes %d\n",
+		(unsigned) addr,
+		(int)pos, copied));
+
+	ret = yaffs_file_write(filp, addr, copied, &pos);
 
+	if (ret != copied) {
+		T(YAFFS_TRACE_OS,
+			("yaffs_write_end not same size ret %d  copied %d\n",
+			ret, copied));
+		SetPageError(pg);
+		ClearPageUptodate(pg);
+	} else {
+		SetPageUptodate(pg);
+	}
+
+	kunmap(pg);
+
+	yaffs_release_space(filp);
+	unlock_page(pg);
+	page_cache_release(pg);
+	return ret;
 }
+#else
 
 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
-			      unsigned to)
+				unsigned to)
 {
+	void *addr, *kva;
 
-	void *addr = page_address(pg) + offset;
 	loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
 	int nBytes = to - offset;
 	int nWritten;
 
 	unsigned spos = pos;
-	unsigned saddr = (unsigned)addr;
+	unsigned saddr;
+
+	kva = kmap(pg);
+	addr = kva + offset;
+
+	saddr = (unsigned) addr;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
-	   spos, nBytes));
+		("yaffs_commit_write addr %x pos %x nBytes %d\n",
+		saddr, spos, nBytes));
 
 	nWritten = yaffs_file_write(f, addr, nBytes, &pos);
 
 	if (nWritten != nBytes) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
-		   "yaffs_commit_write not same size nWritten %d  nBytes %d\n",
-		   nWritten, nBytes));
+			("yaffs_commit_write not same size nWritten %d  nBytes %d\n",
+			nWritten, nBytes));
 		SetPageError(pg);
 		ClearPageUptodate(pg);
 	} else {
 		SetPageUptodate(pg);
 	}
 
+	kunmap(pg);
+
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_commit_write returning %d\n",
-	   nWritten == nBytes ? 0 : nWritten));
+		("yaffs_commit_write returning %d\n",
+		nWritten == nBytes ? 0 : nWritten));
 
 	return nWritten == nBytes ? 0 : nWritten;
-
 }
+#endif
 
-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
+
+static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
 {
 	if (inode && obj) {
 
 
 		/* Check mode against the variant type and attempt to repair if broken. */
- 		__u32 mode = obj->yst_mode;
- 		switch( obj->variantType ){
- 		case YAFFS_OBJECT_TYPE_FILE :
- 		        if( ! S_ISREG(mode) ){
- 			        obj->yst_mode &= ~S_IFMT;
- 			        obj->yst_mode |= S_IFREG;
- 			}
-
- 			break;
- 		case YAFFS_OBJECT_TYPE_SYMLINK :
- 		        if( ! S_ISLNK(mode) ){
- 			        obj->yst_mode &= ~S_IFMT;
- 				obj->yst_mode |= S_IFLNK;
- 			}
-
- 			break;
- 		case YAFFS_OBJECT_TYPE_DIRECTORY :
- 		        if( ! S_ISDIR(mode) ){
- 			        obj->yst_mode &= ~S_IFMT;
- 			        obj->yst_mode |= S_IFDIR;
- 			}
-
- 			break;
- 		case YAFFS_OBJECT_TYPE_UNKNOWN :
- 		case YAFFS_OBJECT_TYPE_HARDLINK :
- 		case YAFFS_OBJECT_TYPE_SPECIAL :
- 		default:
- 		        /* TODO? */
- 		        break;
- 		}
+		__u32 mode = obj->yst_mode;
+		switch (obj->variantType) {
+		case YAFFS_OBJECT_TYPE_FILE:
+			if (!S_ISREG(mode)) {
+				obj->yst_mode &= ~S_IFMT;
+				obj->yst_mode |= S_IFREG;
+			}
+
+			break;
+		case YAFFS_OBJECT_TYPE_SYMLINK:
+			if (!S_ISLNK(mode)) {
+				obj->yst_mode &= ~S_IFMT;
+				obj->yst_mode |= S_IFLNK;
+			}
+
+			break;
+		case YAFFS_OBJECT_TYPE_DIRECTORY:
+			if (!S_ISDIR(mode)) {
+				obj->yst_mode &= ~S_IFMT;
+				obj->yst_mode |= S_IFDIR;
+			}
+
+			break;
+		case YAFFS_OBJECT_TYPE_UNKNOWN:
+		case YAFFS_OBJECT_TYPE_HARDLINK:
+		case YAFFS_OBJECT_TYPE_SPECIAL:
+		default:
+			/* TODO? */
+			break;
+		}
+
+		inode->i_flags |= S_NOATIME;
 
 		inode->i_ino = obj->objectId;
 		inode->i_mode = obj->yst_mode;
 		inode->i_uid = obj->yst_uid;
 		inode->i_gid = obj->yst_gid;
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
 		inode->i_blksize = inode->i_sb->s_blocksize;
 #endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 
 		inode->i_rdev = old_decode_dev(obj->yst_rdev);
 		inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
@@ -781,26 +951,25 @@ static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
 		inode->i_nlink = yaffs_GetObjectLinkCount(obj);
 
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
-		   "yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
-		   inode->i_mode, inode->i_uid, inode->i_gid,
-		   (int)inode->i_size, atomic_read(&inode->i_count)));
+			("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
+			inode->i_mode, inode->i_uid, inode->i_gid,
+			(int)inode->i_size, atomic_read(&inode->i_count)));
 
 		switch (obj->yst_mode & S_IFMT) {
 		default:	/* fifo, device or socket */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 			init_special_inode(inode, obj->yst_mode,
-					   old_decode_dev(obj->yst_rdev));
+					old_decode_dev(obj->yst_rdev));
 #else
 			init_special_inode(inode, obj->yst_mode,
-					   (dev_t) (obj->yst_rdev));
+					(dev_t) (obj->yst_rdev));
 #endif
 			break;
 		case S_IFREG:	/* file */
 			inode->i_op = &yaffs_file_inode_operations;
 			inode->i_fop = &yaffs_file_operations;
 			inode->i_mapping->a_ops =
-			    &yaffs_file_address_operations;
+				&yaffs_file_address_operations;
 			break;
 		case S_IFDIR:	/* directory */
 			inode->i_op = &yaffs_dir_inode_operations;
@@ -817,34 +986,36 @@ static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
 
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_FileInode invalid parameters\n"));
+			("yaffs_FileInode invalid parameters\n"));
 	}
 
 }
 
 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-			      yaffs_Object * obj)
+				yaffs_Object *obj)
 {
 	struct inode *inode;
 
 	if (!sb) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_get_inode for NULL super_block!!\n"));
+			("yaffs_get_inode for NULL super_block!!\n"));
 		return NULL;
 
 	}
 
 	if (!obj) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_get_inode for NULL object!!\n"));
+			("yaffs_get_inode for NULL object!!\n"));
 		return NULL;
 
 	}
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_get_inode for object %d\n", obj->objectId));
+		("yaffs_get_inode for object %d\n", obj->objectId));
 
-	inode = iget(sb, obj->objectId);
+	inode = Y_IGET(sb, obj->objectId);
+	if (IS_ERR(inode))
+		return NULL;
 
 	/* NB Side effect: iget calls back to yaffs_read_inode(). */
 	/* iget also increments the inode's i_count */
@@ -854,7 +1025,7 @@ struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
 }
 
 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-				loff_t * pos)
+				loff_t *pos)
 {
 	yaffs_Object *obj;
 	int nWritten, ipos;
@@ -869,28 +1040,26 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 
 	inode = f->f_dentry->d_inode;
 
-	if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) {
+	if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
 		ipos = inode->i_size;
-	} else {
+	else
 		ipos = *pos;
-	}
 
-	if (!obj) {
+	if (!obj)
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_file_write: hey obj is null!\n"));
-	} else {
+			("yaffs_file_write: hey obj is null!\n"));
+	else
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG
-		   "yaffs_file_write about to write writing %d bytes"
-		   "to object %d at %d\n",
-		   n, obj->objectId, ipos));
-	}
+			("yaffs_file_write about to write writing %zu bytes"
+			"to object %d at %d\n",
+			n, obj->objectId, ipos));
 
 	nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_file_write writing %d bytes, %d written at %d\n",
-	   n, nWritten, ipos));
+		("yaffs_file_write writing %zu bytes, %d written at %d\n",
+		n, nWritten, ipos));
+
 	if (nWritten > 0) {
 		ipos += nWritten;
 		*pos = ipos;
@@ -899,10 +1068,9 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 			inode->i_blocks = (ipos + 511) >> 9;
 
 			T(YAFFS_TRACE_OS,
-			  (KERN_DEBUG
-			   "yaffs_file_write size updated to %d bytes, "
-			   "%d blocks\n",
-			   ipos, (int)(inode->i_blocks)));
+				("yaffs_file_write size updated to %d bytes, "
+				"%d blocks\n",
+				ipos, (int)(inode->i_blocks)));
 		}
 
 	}
@@ -910,13 +1078,54 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	return nWritten == 0 ? -ENOSPC : nWritten;
 }
 
+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+/* For now we just assume few parallel writes and check against a small number. */
+/* Todo: need to do this with a counter to handle parallel reads better */
+
+static ssize_t yaffs_hold_space(struct file *f)
+{
+	yaffs_Object *obj;
+	yaffs_Device *dev;
+
+	int nFreeChunks;
+
+
+	obj = yaffs_DentryToObject(f->f_dentry);
+
+	dev = obj->myDev;
+
+	yaffs_GrossLock(dev);
+
+	nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
+
+	yaffs_GrossUnlock(dev);
+
+	return (nFreeChunks > 20) ? 1 : 0;
+}
+
+static void yaffs_release_space(struct file *f)
+{
+	yaffs_Object *obj;
+	yaffs_Device *dev;
+
+
+	obj = yaffs_DentryToObject(f->f_dentry);
+
+	dev = obj->myDev;
+
+	yaffs_GrossLock(dev);
+
+
+	yaffs_GrossUnlock(dev);
+}
+
 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 {
 	yaffs_Object *obj;
 	yaffs_Device *dev;
 	struct inode *inode = f->f_dentry->d_inode;
 	unsigned long offset, curoffs;
-	struct list_head *i;
+	struct ylist_head *i;
 	yaffs_Object *l;
 
 	char name[YAFFS_MAX_NAME_LENGTH + 1];
@@ -932,24 +1141,20 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 
 	if (offset == 0) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_readdir: entry . ino %d \n",
-		   (int)inode->i_ino));
-		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR)
-		    < 0) {
+			("yaffs_readdir: entry . ino %d \n",
+			(int)inode->i_ino));
+		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
 			goto out;
-		}
 		offset++;
 		f->f_pos++;
 	}
 	if (offset == 1) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_readdir: entry .. ino %d \n",
-		   (int)f->f_dentry->d_parent->d_inode->i_ino));
-		if (filldir
-		    (dirent, "..", 2, offset,
-		     f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
+			("yaffs_readdir: entry .. ino %d \n",
+			(int)f->f_dentry->d_parent->d_inode->i_ino));
+		if (filldir(dirent, "..", 2, offset,
+			f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
 			goto out;
-		}
 		offset++;
 		f->f_pos++;
 	}
@@ -965,35 +1170,32 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 		f->f_version = inode->i_version;
 	}
 
-	list_for_each(i, &obj->variant.directoryVariant.children) {
+	ylist_for_each(i, &obj->variant.directoryVariant.children) {
 		curoffs++;
 		if (curoffs >= offset) {
-			l = list_entry(i, yaffs_Object, siblings);
+			l = ylist_entry(i, yaffs_Object, siblings);
 
 			yaffs_GetObjectName(l, name,
 					    YAFFS_MAX_NAME_LENGTH + 1);
 			T(YAFFS_TRACE_OS,
-			  (KERN_DEBUG "yaffs_readdir: %s inode %d\n", name,
+			  ("yaffs_readdir: %s inode %d\n", name,
 			   yaffs_GetObjectInode(l)));
 
 			if (filldir(dirent,
-				    name,
-				    strlen(name),
-				    offset,
-				    yaffs_GetObjectInode(l),
-				    yaffs_GetObjectType(l))
-			    < 0) {
+					name,
+					strlen(name),
+					offset,
+					yaffs_GetObjectInode(l),
+					yaffs_GetObjectType(l)) < 0)
 				goto up_and_out;
-			}
 
 			offset++;
 			f->f_pos++;
 		}
 	}
 
-      up_and_out:
-      out:
-
+up_and_out:
+out:
 	yaffs_GrossUnlock(dev);
 
 	return 0;
@@ -1002,12 +1204,19 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 /*
  * File creation. Allocate an inode, and we're done..
  */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+#define YCRED(x) x
+#else
+#define YCRED(x) (x->cred)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-		       dev_t rdev)
+			dev_t rdev)
 #else
 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-		       int rdev)
+			int rdev)
 #endif
 {
 	struct inode *inode;
@@ -1018,25 +1227,25 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 	yaffs_Object *parent = yaffs_InodeToObject(dir);
 
 	int error = -ENOSPC;
-	uid_t uid = current->fsuid;
-	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+	uid_t uid = YCRED(current)->fsuid;
+	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
 
-	if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+	if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
 		mode |= S_ISGID;
 
 	if (parent) {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod: parent object %d type %d\n",
-		   parent->objectId, parent->variantType));
+			("yaffs_mknod: parent object %d type %d\n",
+			parent->objectId, parent->variantType));
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod: could not get parent object\n"));
+			("yaffs_mknod: could not get parent object\n"));
 		return -EPERM;
 	}
 
 	T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
-			   "mode %x dev %x\n",
-			   dentry->d_name.name, mode, rdev));
+			"mode %x dev %x\n",
+			dentry->d_name.name, mode, rdev));
 
 	dev = parent->myDev;
 
@@ -1045,33 +1254,28 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 	switch (mode & S_IFMT) {
 	default:
 		/* Special (socket, fifo, device...) */
-		T(YAFFS_TRACE_OS, (KERN_DEBUG
-				   "yaffs_mknod: making special\n"));
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-		obj =
-		    yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
-				       gid, old_encode_dev(rdev));
+		T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+		obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+				gid, old_encode_dev(rdev));
 #else
-		obj =
-		    yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
-				       gid, rdev);
+		obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+				gid, rdev);
 #endif
 		break;
 	case S_IFREG:		/* file          */
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
-		obj =
-		    yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
-				    gid);
+		T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
+		obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
+				gid);
 		break;
 	case S_IFDIR:		/* directory */
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod: making directory\n"));
-		obj =
-		    yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
-					 uid, gid);
+			("yaffs_mknod: making directory\n"));
+		obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
+					uid, gid);
 		break;
 	case S_IFLNK:		/* symlink */
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mknod: making file\n"));
+		T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
 		obj = NULL;	/* Do we ever get here? */
 		break;
 	}
@@ -1083,12 +1287,12 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
 		d_instantiate(dentry, inode);
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod created object %d count = %d\n",
-		   obj->objectId, atomic_read(&inode->i_count)));
+			("yaffs_mknod created object %d count = %d\n",
+			obj->objectId, atomic_read(&inode->i_count)));
 		error = 0;
 	} else {
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_mknod failed making object\n"));
+			("yaffs_mknod failed making object\n"));
 		error = -ENOMEM;
 	}
 
@@ -1098,25 +1302,19 @@ static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
 static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
 	int retVal;
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_mkdir\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
 	retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
-#if 0
-	/* attempt to fix dir bug - didn't work */
-	if (!retVal) {
-		dget(dentry);
-	}
-#endif
 	return retVal;
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
 			struct nameidata *n)
 #else
 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
 #endif
 {
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_create\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_create\n"));
 	return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
 }
 
@@ -1127,8 +1325,8 @@ static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
 	yaffs_Device *dev;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_unlink %d:%s\n", (int)(dir->i_ino),
-	   dentry->d_name.name));
+		("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
+		dentry->d_name.name));
 
 	dev = yaffs_InodeToObject(dir)->myDev;
 
@@ -1151,82 +1349,74 @@ static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
  * Create a link...
  */
 static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-		      struct dentry *dentry)
+			struct dentry *dentry)
 {
 	struct inode *inode = old_dentry->d_inode;
 	yaffs_Object *obj = NULL;
 	yaffs_Object *link = NULL;
 	yaffs_Device *dev;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_link\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_link\n"));
 
 	obj = yaffs_InodeToObject(inode);
 	dev = obj->myDev;
 
 	yaffs_GrossLock(dev);
 
-	if (!S_ISDIR(inode->i_mode))	/* Don't link directories */
-	{
-		link =
-		    yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
-			       obj);
-	}
+	if (!S_ISDIR(inode->i_mode))		/* Don't link directories */
+		link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
+			obj);
 
 	if (link) {
 		old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
 		d_instantiate(dentry, old_dentry->d_inode);
 		atomic_inc(&old_dentry->d_inode->i_count);
 		T(YAFFS_TRACE_OS,
-		  (KERN_DEBUG "yaffs_link link count %d i_count %d\n",
-		   old_dentry->d_inode->i_nlink,
-		   atomic_read(&old_dentry->d_inode->i_count)));
-
+			("yaffs_link link count %d i_count %d\n",
+			old_dentry->d_inode->i_nlink,
+			atomic_read(&old_dentry->d_inode->i_count)));
 	}
 
 	yaffs_GrossUnlock(dev);
 
-	if (link) {
-
+	if (link)
 		return 0;
-	}
 
 	return -EPERM;
 }
 
 static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-			 const char *symname)
+				const char *symname)
 {
 	yaffs_Object *obj;
 	yaffs_Device *dev;
-	uid_t uid = current->fsuid;
-	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+	uid_t uid = YCRED(current)->fsuid;
+	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_symlink\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
 
 	dev = yaffs_InodeToObject(dir)->myDev;
 	yaffs_GrossLock(dev);
 	obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
-				 S_IFLNK | S_IRWXUGO, uid, gid, symname);
+				S_IFLNK | S_IRWXUGO, uid, gid, symname);
 	yaffs_GrossUnlock(dev);
 
 	if (obj) {
-
 		struct inode *inode;
 
 		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
 		d_instantiate(dentry, inode);
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink created OK\n"));
+		T(YAFFS_TRACE_OS, ("symlink created OK\n"));
 		return 0;
 	} else {
-		T(YAFFS_TRACE_OS, (KERN_DEBUG "symlink not created\n"));
-
+		T(YAFFS_TRACE_OS, ("symlink not created\n"));
 	}
 
 	return -ENOMEM;
 }
 
 static int yaffs_sync_object(struct file *file, struct dentry *dentry,
-			     int datasync)
+				int datasync)
 {
 
 	yaffs_Object *obj;
@@ -1236,7 +1426,7 @@ static int yaffs_sync_object(struct file *file, struct dentry *dentry,
 
 	dev = obj->myDev;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_object\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
 	yaffs_GrossLock(dev);
 	yaffs_FlushFile(obj, 1);
 	yaffs_GrossUnlock(dev);
@@ -1255,41 +1445,36 @@ static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	int retVal = YAFFS_FAIL;
 	yaffs_Object *target;
 
-        T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
 	dev = yaffs_InodeToObject(old_dir)->myDev;
 
 	yaffs_GrossLock(dev);
 
 	/* Check if the target is an existing directory that is not empty. */
-	target =
-	    yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
-				   new_dentry->d_name.name);
+	target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
+				new_dentry->d_name.name);
 
 
 
-	if (target &&
-	    target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
-	    !list_empty(&target->variant.directoryVariant.children)) {
+	if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+		!ylist_empty(&target->variant.directoryVariant.children)) {
 
-	        T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
+		T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
 
 		retVal = YAFFS_FAIL;
 	} else {
-
 		/* Now does unlinking internally using shadowing mechanism */
-	        T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
-
-		retVal =
-		    yaffs_RenameObject(yaffs_InodeToObject(old_dir),
-				       old_dentry->d_name.name,
-				       yaffs_InodeToObject(new_dir),
-				       new_dentry->d_name.name);
+		T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
 
+		retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
+				old_dentry->d_name.name,
+				yaffs_InodeToObject(new_dir),
+				new_dentry->d_name.name);
 	}
 	yaffs_GrossUnlock(dev);
 
 	if (retVal == YAFFS_OK) {
-		if(target) {
+		if (target) {
 			new_dentry->d_inode->i_nlink--;
 			mark_inode_dirty(new_dentry->d_inode);
 		}
@@ -1298,7 +1483,6 @@ static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	} else {
 		return -ENOTEMPTY;
 	}
-
 }
 
 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
@@ -1308,15 +1492,15 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 	yaffs_Device *dev;
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_setattr of object %d\n",
-	   yaffs_InodeToObject(inode)->objectId));
-
-	if ((error = inode_change_ok(inode, attr)) == 0) {
+		("yaffs_setattr of object %d\n",
+		yaffs_InodeToObject(inode)->objectId));
 
+	error = inode_change_ok(inode, attr);
+	if (error == 0) {
 		dev = yaffs_InodeToObject(inode)->myDev;
 		yaffs_GrossLock(dev);
 		if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
-		    YAFFS_OK) {
+				YAFFS_OK) {
 			error = 0;
 		} else {
 			error = -EPERM;
@@ -1328,12 +1512,12 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 	return error;
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
 	struct super_block *sb = dentry->d_sb;
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
 {
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
@@ -1343,32 +1527,53 @@ static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
 #endif
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_statfs\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
 
 	yaffs_GrossLock(dev);
 
 	buf->f_type = YAFFS_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_namelen = 255;
-	if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+
+	if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
+		/* Do this if chunk size is not a power of 2 */
+
+		uint64_t bytesInDev;
+		uint64_t bytesFree;
+
+		bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
+			((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
+
+		do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
+		buf->f_blocks = bytesInDev;
+
+		bytesFree  = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
+			((uint64_t)(dev->nDataBytesPerChunk));
+
+		do_div(bytesFree, sb->s_blocksize);
+
+		buf->f_bfree = bytesFree;
+
+	} else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
 
 		buf->f_blocks =
-		    (dev->endBlock - dev->startBlock +
-		     1) * dev->nChunksPerBlock / (sb->s_blocksize /
-						  dev->nDataBytesPerChunk);
+			(dev->endBlock - dev->startBlock + 1) *
+			dev->nChunksPerBlock /
+			(sb->s_blocksize / dev->nDataBytesPerChunk);
 		buf->f_bfree =
-		    yaffs_GetNumberOfFreeChunks(dev) / (sb->s_blocksize /
-							dev->nDataBytesPerChunk);
+			yaffs_GetNumberOfFreeChunks(dev) /
+			(sb->s_blocksize / dev->nDataBytesPerChunk);
 	} else {
-
 		buf->f_blocks =
-		    (dev->endBlock - dev->startBlock +
-		     1) * dev->nChunksPerBlock * (dev->nDataBytesPerChunk /
-						  sb->s_blocksize);
+			(dev->endBlock - dev->startBlock + 1) *
+			dev->nChunksPerBlock *
+			(dev->nDataBytesPerChunk / sb->s_blocksize);
+
 		buf->f_bfree =
-		    yaffs_GetNumberOfFreeChunks(dev) * (dev->nDataBytesPerChunk /
-							sb->s_blocksize);
+			yaffs_GetNumberOfFreeChunks(dev) *
+			(dev->nDataBytesPerChunk / sb->s_blocksize);
 	}
+
 	buf->f_files = 0;
 	buf->f_ffree = 0;
 	buf->f_bavail = buf->f_bfree;
@@ -1378,18 +1583,19 @@ static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
 }
 
 
-/**
 static int yaffs_do_sync_fs(struct super_block *sb)
 {
 
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
 
-	if(sb->s_dirt) {
+	if (sb->s_dirt) {
 		yaffs_GrossLock(dev);
 
-		if(dev)
+		if (dev) {
+			yaffs_FlushEntireDeviceCache(dev);
 			yaffs_CheckpointSave(dev);
+		}
 
 		yaffs_GrossUnlock(dev);
 
@@ -1397,35 +1603,73 @@ static int yaffs_do_sync_fs(struct super_block *sb)
 	}
 	return 0;
 }
-**/
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static void yaffs_write_super(struct super_block *sb)
 #else
 static int yaffs_write_super(struct super_block *sb)
 #endif
 {
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
-	return 0; /* yaffs_do_sync_fs(sb);*/
+	T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
+	if (yaffs_auto_checkpoint >= 2)
+		yaffs_do_sync_fs(sb);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+	return 0;
 #endif
 }
 
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_sync_fs(struct super_block *sb, int wait)
 #else
 static int yaffs_sync_fs(struct super_block *sb)
 #endif
 {
+	T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
+
+	if (yaffs_auto_checkpoint >= 1)
+		yaffs_do_sync_fs(sb);
+
+	return 0;
+}
+
+#ifdef YAFFS_USE_OWN_IGET
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+{
+	struct inode *inode;
+	yaffs_Object *obj;
+	yaffs_Device *dev = yaffs_SuperToDevice(sb);
 
-	return 0; /* yaffs_do_sync_fs(sb);*/
+	T(YAFFS_TRACE_OS,
+		("yaffs_iget for %lu\n", ino));
 
+	inode = iget_locked(sb, ino);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+
+	/* NB This is called as a side effect of other functions, but
+	 * we had to release the lock to prevent deadlocks, so
+	 * need to lock again.
+	 */
+
+	yaffs_GrossLock(dev);
+
+	obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+
+	yaffs_FillInodeFromObject(inode, obj);
+
+	yaffs_GrossUnlock(dev);
+
+	unlock_new_inode(inode);
+	return inode;
 }
 
+#else
 
 static void yaffs_read_inode(struct inode *inode)
 {
@@ -1438,7 +1682,7 @@ static void yaffs_read_inode(struct inode *inode)
 	yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
 
 	T(YAFFS_TRACE_OS,
-	  (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino));
+		("yaffs_read_inode for %d\n", (int)inode->i_ino));
 
 	yaffs_GrossLock(dev);
 
@@ -1449,18 +1693,20 @@ static void yaffs_read_inode(struct inode *inode)
 	yaffs_GrossUnlock(dev);
 }
 
-static LIST_HEAD(yaffs_dev_list);
+#endif
+
+static YLIST_HEAD(yaffs_dev_list);
 
-#if 0 // not used
+#if 0 /* not used */
 static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
 {
 	yaffs_Device    *dev = yaffs_SuperToDevice(sb);
 
-	if( *flags & MS_RDONLY ) {
+	if (*flags & MS_RDONLY) {
 		struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
 
 		T(YAFFS_TRACE_OS,
-			(KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
+			("yaffs_remount_fs: %s: RO\n", dev->name));
 
 		yaffs_GrossLock(dev);
 
@@ -1472,10 +1718,9 @@ static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
 			mtd->sync(mtd);
 
 		yaffs_GrossUnlock(dev);
-	}
-	else {
+	} else {
 		T(YAFFS_TRACE_OS,
-			(KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
+			("yaffs_remount_fs: %s: RW\n", dev->name));
 	}
 
 	return 0;
@@ -1486,7 +1731,7 @@ static void yaffs_put_super(struct super_block *sb)
 {
 	yaffs_Device *dev = yaffs_SuperToDevice(sb);
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
+	T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
 
 	yaffs_GrossLock(dev);
 
@@ -1494,18 +1739,17 @@ static void yaffs_put_super(struct super_block *sb)
 
 	yaffs_CheckpointSave(dev);
 
-	if (dev->putSuperFunc) {
+	if (dev->putSuperFunc)
 		dev->putSuperFunc(sb);
-	}
 
 	yaffs_Deinitialise(dev);
 
 	yaffs_GrossUnlock(dev);
 
 	/* we assume this is protected by lock_kernel() in mount/umount */
-	list_del(&dev->devList);
+	ylist_del(&dev->devList);
 
-	if(dev->spareBuffer){
+	if (dev->spareBuffer) {
 		YFREE(dev->spareBuffer);
 		dev->spareBuffer = NULL;
 	}
@@ -1516,12 +1760,10 @@ static void yaffs_put_super(struct super_block *sb)
 
 static void yaffs_MTDPutSuper(struct super_block *sb)
 {
-
 	struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
 
-	if (mtd->sync) {
+	if (mtd->sync)
 		mtd->sync(mtd);
-	}
 
 	put_mtd_device(mtd);
 }
@@ -1531,9 +1773,9 @@ static void yaffs_MarkSuperBlockDirty(void *vsb)
 {
 	struct super_block *sb = (struct super_block *)vsb;
 
-	T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
-//	if(sb)
-//		sb->s_dirt = 1;
+	T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
+	if (sb)
+		sb->s_dirt = 1;
 }
 
 typedef struct {
@@ -1546,48 +1788,48 @@ typedef struct {
 #define MAX_OPT_LEN 20
 static int yaffs_parse_options(yaffs_options *options, const char *options_str)
 {
-	char cur_opt[MAX_OPT_LEN+1];
+	char cur_opt[MAX_OPT_LEN + 1];
 	int p;
 	int error = 0;
 
 	/* Parse through the options which is a comma seperated list */
 
-	while(options_str && *options_str && !error){
-		memset(cur_opt,0,MAX_OPT_LEN+1);
+	while (options_str && *options_str && !error) {
+		memset(cur_opt, 0, MAX_OPT_LEN + 1);
 		p = 0;
 
-		while(*options_str && *options_str != ','){
-			if(p < MAX_OPT_LEN){
+		while (*options_str && *options_str != ',') {
+			if (p < MAX_OPT_LEN) {
 				cur_opt[p] = *options_str;
 				p++;
 			}
 			options_str++;
 		}
 
-		if(!strcmp(cur_opt,"inband-tags"))
+		if (!strcmp(cur_opt, "inband-tags"))
 			options->inband_tags = 1;
-		else if(!strcmp(cur_opt,"no-cache"))
+		else if (!strcmp(cur_opt, "no-cache"))
 			options->no_cache = 1;
-		else if(!strcmp(cur_opt,"no-checkpoint-read"))
+		else if (!strcmp(cur_opt, "no-checkpoint-read"))
 			options->skip_checkpoint_read = 1;
-		else if(!strcmp(cur_opt,"no-checkpoint-write"))
+		else if (!strcmp(cur_opt, "no-checkpoint-write"))
 			options->skip_checkpoint_write = 1;
-		else if(!strcmp(cur_opt,"no-checkpoint")){
+		else if (!strcmp(cur_opt, "no-checkpoint")) {
 			options->skip_checkpoint_read = 1;
 			options->skip_checkpoint_write = 1;
 		} else {
-			printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
+			printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
+					cur_opt);
 			error = 1;
 		}
-
 	}
 
 	return error;
 }
 
 static struct super_block *yaffs_internal_read_super(int yaffsVersion,
-						     struct super_block *sb,
-						     void *data, int silent)
+						struct super_block *sb,
+						void *data, int silent)
 {
 	int nBlocks;
 	struct inode *inode = NULL;
@@ -1602,6 +1844,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 
 	sb->s_magic = YAFFS_MAGIC;
 	sb->s_op = &yaffs_super_ops;
+	sb->s_flags |= MS_NOATIME;
 
 	if (!sb)
 		printk(KERN_INFO "yaffs: sb is NULL\n");
@@ -1614,14 +1857,14 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		       sb->s_dev,
 		       yaffs_devname(sb, devname_buf));
 
-	if(!data_str)
+	if (!data_str)
 		data_str = "";
 
-	printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
+	printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
 
-	memset(&options,0,sizeof(options));
+	memset(&options, 0, sizeof(options));
 
-	if(yaffs_parse_options(&options,data_str)){
+	if (yaffs_parse_options(&options, data_str)) {
 		/* Option parsing failed */
 		return NULL;
 	}
@@ -1645,9 +1888,9 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 			       yaffs_devname(sb, devname_buf)));
 
 	/* Check it's an mtd device..... */
-	if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
+	if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
 		return NULL;	/* This isn't an mtd device */
-	}
+
 	/* Get the device */
 	mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
 	if (!mtd) {
@@ -1673,29 +1916,23 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 	T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
 	T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
 	T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
-	T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+	T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
+#else
+	T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
+#endif
 
 #ifdef CONFIG_YAFFS_AUTO_YAFFS2
 
-	if (yaffsVersion == 1 &&
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-	    mtd->writesize >= 2048) {
-#else
-	    mtd->oobblock >= 2048) {
-#endif
-	    T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
-	    yaffsVersion = 2;
+	if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
+		T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
+		yaffsVersion = 2;
 	}
 
 	/* Added NCB 26/5/2006 for completeness */
-	if (yaffsVersion == 2 &&
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-	    mtd->writesize == 512) {
-#else
-	    mtd->oobblock == 512) {
-#endif
-	    T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
-	    yaffsVersion = 1;
+	if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
+		T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
+		yaffsVersion = 1;
 	}
 
 #endif
@@ -1707,7 +1944,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		    !mtd->block_markbad ||
 		    !mtd->read ||
 		    !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 		    !mtd->read_oob || !mtd->write_oob) {
 #else
 		    !mtd->write_ecc ||
@@ -1719,12 +1956,9 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 			return NULL;
 		}
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-		if (mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-#else
-		if (mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-#endif
-		    mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) {
+		if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+		    mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
+		    !options.inband_tags) {
 			T(YAFFS_TRACE_ALWAYS,
 			  ("yaffs: MTD device does not have the "
 			   "right page sizes\n"));
@@ -1735,7 +1969,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		if (!mtd->erase ||
 		    !mtd->read ||
 		    !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 		    !mtd->read_oob || !mtd->write_oob) {
 #else
 		    !mtd->write_ecc ||
@@ -1761,7 +1995,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 	 * Set the yaffs_Device up for mtd
 	 */
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 	sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
 #else
 	sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
@@ -1780,13 +2014,15 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 
 	/* Set up the memory size parameters.... */
 
-	nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+	nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
+
 	dev->startBlock = 0;
 	dev->endBlock = nBlocks - 1;
 	dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
-	dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+	dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
 	dev->nReservedBlocks = 5;
 	dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+	dev->inbandTags = options.inband_tags;
 
 	/* ... and the functions. */
 	if (yaffsVersion == 2) {
@@ -1798,20 +2034,19 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
 		dev->spareBuffer = YMALLOC(mtd->oobsize);
 		dev->isYaffs2 = 1;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-		dev->nDataBytesPerChunk = mtd->writesize;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+		dev->totalBytesPerChunk = mtd->writesize;
 		dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
 #else
-		dev->nDataBytesPerChunk = mtd->oobblock;
+		dev->totalBytesPerChunk = mtd->oobblock;
 		dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
 #endif
-		nBlocks = mtd->size / mtd->erasesize;
+		nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
 
-		dev->nCheckpointReservedBlocks = CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS;
 		dev->startBlock = 0;
 		dev->endBlock = nBlocks - 1;
 	} else {
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 		/* use the MTD interface in yaffs_mtdif1.c */
 		dev->writeChunkWithTagsToNAND =
 			nandmtd1_WriteChunkWithTagsToNAND;
@@ -1847,7 +2082,7 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 	dev->skipCheckpointWrite = options.skip_checkpoint_write;
 
 	/* we assume this is protected by lock_kernel() in mount/umount */
-	list_add_tail(&dev->devList, &yaffs_dev_list);
+	ylist_add_tail(&dev->devList, &yaffs_dev_list);
 
 	init_MUTEX(&dev->grossLock);
 
@@ -1884,20 +2119,23 @@ static struct super_block *yaffs_internal_read_super(int yaffsVersion,
 		return NULL;
 	}
 	sb->s_root = root;
+	sb->s_dirt = !dev->isCheckpointed;
+	T(YAFFS_TRACE_ALWAYS,
+	  ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
 
 	T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
 	return sb;
 }
 
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
 					 int silent)
 {
 	return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs_read_super(struct file_system_type *fs,
 			    int flags, const char *dev_name,
 			    void *data, struct vfsmount *mnt)
@@ -1938,14 +2176,14 @@ static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
 
 #ifdef CONFIG_YAFFS_YAFFS2
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
 					  int silent)
 {
 	return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
 }
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
 static int yaffs2_read_super(struct file_system_type *fs,
 			int flags, const char *dev_name, void *data,
 			struct vfsmount *mnt)
@@ -1990,12 +2228,12 @@ static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
 {
 	buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
 	buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
+	buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
 	buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
 	buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
 	buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
 	buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
 	buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
-	buf += sprintf(buf, "nCheckptResBlocks.. %d\n", dev->nCheckpointReservedBlocks);
 	buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
 	buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
 	buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
@@ -2006,10 +2244,8 @@ static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
 	buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
 	buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
 	buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
-	buf +=
-	    sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
-	buf +=
-	    sprintf(buf, "passiveGCs......... %d\n",
+	buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
+	buf += sprintf(buf, "passiveGCs......... %d\n",
 		    dev->passiveGarbageCollections);
 	buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
 	buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
@@ -2025,6 +2261,7 @@ static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
 	    sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
 	buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
 	buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
+	buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
 
 	return buf;
 }
@@ -2033,7 +2270,7 @@ static int yaffs_proc_read(char *page,
 			   char **start,
 			   off_t offset, int count, int *eof, void *data)
 {
-	struct list_head *item;
+	struct ylist_head *item;
 	char *buf = page;
 	int step = offset;
 	int n = 0;
@@ -2057,8 +2294,8 @@ static int yaffs_proc_read(char *page,
 	lock_kernel();
 
 	/* Locate and print the Nth entry.  Order N-squared but N is small. */
-	list_for_each(item, &yaffs_dev_list) {
-		yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
+	ylist_for_each(item, &yaffs_dev_list) {
+		yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
 		if (n < step) {
 			n++;
 			continue;
@@ -2119,7 +2356,7 @@ static int yaffs_proc_write(struct file *file, const char *buf,
 	char *end;
 	char *mask_name;
 	const char *x;
-	char substring[MAX_MASK_NAME_LENGTH+1];
+	char substring[MAX_MASK_NAME_LENGTH + 1];
 	int i;
 	int done = 0;
 	int add, len = 0;
@@ -2129,9 +2366,8 @@ static int yaffs_proc_write(struct file *file, const char *buf,
 
 	while (!done && (pos < count)) {
 		done = 1;
-		while ((pos < count) && isspace(buf[pos])) {
+		while ((pos < count) && isspace(buf[pos]))
 			pos++;
-		}
 
 		switch (buf[pos]) {
 		case '+':
@@ -2148,20 +2384,21 @@ static int yaffs_proc_write(struct file *file, const char *buf,
 		mask_name = NULL;
 
 		mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+
 		if (end > buf + pos) {
 			mask_name = "numeral";
 			len = end - (buf + pos);
 			pos += len;
 			done = 0;
 		} else {
-			for(x = buf + pos, i = 0;
-			    (*x == '_' || (*x >='a' && *x <= 'z')) &&
-			    i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
-			    substring[i] = *x;
+			for (x = buf + pos, i = 0;
+			    (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
+			    i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
+				substring[i] = *x;
 			substring[i] = '\0';
 
 			for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-				if(strcmp(substring,mask_flags[i].mask_name) == 0){
+				if (strcmp(substring, mask_flags[i].mask_name) == 0) {
 					mask_name = mask_flags[i].mask_name;
 					mask_bitfield = mask_flags[i].mask_bitfield;
 					done = 0;
@@ -2172,7 +2409,7 @@ static int yaffs_proc_write(struct file *file, const char *buf,
 
 		if (mask_name != NULL) {
 			done = 0;
-			switch(add) {
+			switch (add) {
 			case '-':
 				rg &= ~mask_bitfield;
 				break;
@@ -2191,13 +2428,13 @@ static int yaffs_proc_write(struct file *file, const char *buf,
 
 	yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
 
-	printk("new trace = 0x%08X\n",yaffs_traceMask);
+	printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
 
 	if (rg & YAFFS_TRACE_ALWAYS) {
 		for (i = 0; mask_flags[i].mask_name != NULL; i++) {
 			char flag;
 			flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
-			printk("%c%s\n", flag, mask_flags[i].mask_name);
+			printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
 		}
 	}
 
@@ -2211,12 +2448,8 @@ struct file_system_to_install {
 };
 
 static struct file_system_to_install fs_to_install[] = {
-//#ifdef CONFIG_YAFFS_YAFFS1
 	{&yaffs_fs_type, 0},
-//#endif
-//#ifdef CONFIG_YAFFS_YAFFS2
 	{&yaffs2_fs_type, 0},
-//#endif
 	{NULL, 0}
 };
 
@@ -2231,15 +2464,14 @@ static int __init init_yaffs_fs(void)
 	/* Install the proc_fs entry */
 	my_proc_entry = create_proc_entry("yaffs",
 					       S_IRUGO | S_IFREG,
-					       &proc_root);
+					       YPROC_ROOT);
 
 	if (my_proc_entry) {
 		my_proc_entry->write_proc = yaffs_proc_write;
 		my_proc_entry->read_proc = yaffs_proc_read;
 		my_proc_entry->data = NULL;
-	} else {
+	} else
 		return -ENOMEM;
-	}
 
 	/* Now add the file system entries */
 
@@ -2247,9 +2479,8 @@ static int __init init_yaffs_fs(void)
 
 	while (fsinst->fst && !error) {
 		error = register_filesystem(fsinst->fst);
-		if (!error) {
+		if (!error)
 			fsinst->installed = 1;
-		}
 		fsinst++;
 	}
 
@@ -2277,7 +2508,7 @@ static void __exit exit_yaffs_fs(void)
 	T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
 			       " removing. \n"));
 
-	remove_proc_entry("yaffs", &proc_root);
+	remove_proc_entry("yaffs", YPROC_ROOT);
 
 	fsinst = fs_to_install;
 
@@ -2288,7 +2519,6 @@ static void __exit exit_yaffs_fs(void)
 		}
 		fsinst++;
 	}
-
 }
 
 module_init(init_yaffs_fs)
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_getblockinfo.h b/target/linux/generic/files/fs/yaffs2/yaffs_getblockinfo.h
new file mode 100644
index 000000000..5b0a1ac24
--- /dev/null
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_getblockinfo.h
@@ -0,0 +1,34 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2007 Aleph One Ltd.
+ *   for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+#ifndef __YAFFS_GETBLOCKINFO_H__
+#define __YAFFS_GETBLOCKINFO_H__
+
+#include "yaffs_guts.h"
+
+/* Function to manipulate block info */
+static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
+{
+	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
+		T(YAFFS_TRACE_ERROR,
+		  (TSTR
+		   ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
+		   blk));
+		YBUG();
+	}
+	return &dev->blockInfo[blk - dev->internalStartBlock];
+}
+
+#endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_guts.c b/target/linux/generic/files/fs/yaffs2/yaffs_guts.c
index 2ab814691..d89b87af4 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_guts.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_guts.c
@@ -12,16 +12,17 @@
  */
 
 const char *yaffs_guts_c_version =
-    "$Id: yaffs_guts.c,v 1.49 2007-05-15 20:07:40 charles Exp $";
+    "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $";
 
 #include "yportenv.h"
 
 #include "yaffsinterface.h"
 #include "yaffs_guts.h"
 #include "yaffs_tagsvalidity.h"
+#include "yaffs_getblockinfo.h"
 
 #include "yaffs_tagscompat.h"
-#ifndef  CONFIG_YAFFS_USE_OWN_SORT
+#ifndef CONFIG_YAFFS_USE_OWN_SORT
 #include "yaffs_qsort.h"
 #endif
 #include "yaffs_nand.h"
@@ -32,116 +33,116 @@ const char *yaffs_guts_c_version =
 #include "yaffs_packedtags2.h"
 
 
-#ifdef CONFIG_YAFFS_WINCE
-void yfsd_LockYAFFS(BOOL fsLockOnly);
-void yfsd_UnlockYAFFS(BOOL fsLockOnly);
-#endif
-
 #define YAFFS_PASSIVE_GC_CHUNKS 2
 
 #include "yaffs_ecc.h"
 
 
 /* Robustification (if it ever comes about...) */
-static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND);
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk);
-static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
-				     const __u8 * data,
-				     const yaffs_ExtendedTags * tags);
-static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
-				    const yaffs_ExtendedTags * tags);
+static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+		int erasedOk);
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+				const __u8 *data,
+				const yaffs_ExtendedTags *tags);
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+				const yaffs_ExtendedTags *tags);
 
 /* Other local prototypes */
-static int yaffs_UnlinkObject( yaffs_Object *obj);
+static int yaffs_UnlinkObject(yaffs_Object *obj);
 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
 
 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
 
-static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev,
-					     const __u8 * buffer,
-					     yaffs_ExtendedTags * tags,
-					     int useReserve);
-static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
-				  int chunkInNAND, int inScan);
-
-static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
-					   yaffs_ObjectType type);
-static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
-				       yaffs_Object * obj);
-static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name,
-				    int force, int isShrink, int shadows);
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj);
+static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
+					const __u8 *buffer,
+					yaffs_ExtendedTags *tags,
+					int useReserve);
+static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+				int chunkInNAND, int inScan);
+
+static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+					yaffs_ObjectType type);
+static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+				yaffs_Object *obj);
+static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
+				int force, int isShrink, int shadows);
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
 static int yaffs_CheckStructures(void);
-static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
-			      int chunkOffset, int *limit);
-static int yaffs_DoGenericObjectDeletion(yaffs_Object * in);
+static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+			int chunkOffset, int *limit);
+static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
 
-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo);
+static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
 
-static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo);
-static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
-				    int lineNo);
 
 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
-				  int chunkInNAND);
-
-static int yaffs_UnlinkWorker(yaffs_Object * obj);
-static void yaffs_DestroyObject(yaffs_Object * obj);
+				int chunkInNAND);
 
-static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
-			   int chunkInObject);
+static int yaffs_UnlinkWorker(yaffs_Object *obj);
 
-loff_t yaffs_GetFileSize(yaffs_Object * obj);
+static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+			int chunkInObject);
 
-static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr);
+static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+				yaffs_BlockInfo **blockUsedPtr);
 
-static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
+static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
 
 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
 
+static void yaffs_VerifyDirectory(yaffs_Object *directory);
 #ifdef YAFFS_PARANOID
-static int yaffs_CheckFileSanity(yaffs_Object * in);
+static int yaffs_CheckFileSanity(yaffs_Object *in);
 #else
 #define yaffs_CheckFileSanity(in)
 #endif
 
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in);
-static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId);
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
+static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
 
 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
 
-static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
-				 yaffs_ExtendedTags * tags);
+static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+				yaffs_ExtendedTags *tags);
 
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
-					  yaffs_FileStructure * fStruct,
-					  __u32 chunkId);
+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+		unsigned pos);
+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+					yaffs_FileStructure *fStruct,
+					__u32 chunkId);
 
 
 /* Function to calculate chunk and offset */
 
-static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset)
+static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
+		__u32 *offsetOut)
 {
-	if(dev->chunkShift){
-		/* Easy-peasy power of 2 case */
-		*chunk  = (__u32)(addr >> dev->chunkShift);
-		*offset = (__u32)(addr & dev->chunkMask);
-	}
-	else if(dev->crumbsPerChunk)
-	{
-		/* Case where we're using "crumbs" */
-		*offset = (__u32)(addr & dev->crumbMask);
-		addr >>= dev->crumbShift;
-		*chunk = ((__u32)addr)/dev->crumbsPerChunk;
-		*offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift);
+	int chunk;
+	__u32 offset;
+
+	chunk  = (__u32)(addr >> dev->chunkShift);
+
+	if (dev->chunkDiv == 1) {
+		/* easy power of 2 case */
+		offset = (__u32)(addr & dev->chunkMask);
+	} else {
+		/* Non power-of-2 case */
+
+		loff_t chunkBase;
+
+		chunk /= dev->chunkDiv;
+
+		chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
+		offset = (__u32)(addr - chunkBase);
 	}
-	else
-		YBUG();
+
+	*chunkOut = chunk;
+	*offsetOut = offset;
 }
 
-/* Function to return the number of shifts for a power of 2 greater than or equal
- * to the given number
+/* Function to return the number of shifts for a power of 2 greater than or
+ * equal to the given number
  * Note we don't try to cater for all possible numbers and this does not have to
  * be hellishly efficient.
  */
@@ -153,13 +154,14 @@ static __u32 ShiftsGE(__u32 x)
 
 	nShifts = extraBits = 0;
 
-	while(x>1){
-		if(x & 1) extraBits++;
-		x>>=1;
+	while (x > 1) {
+		if (x & 1)
+			extraBits++;
+		x >>= 1;
 		nShifts++;
 	}
 
-	if(extraBits)
+	if (extraBits)
 		nShifts++;
 
 	return nShifts;
@@ -168,16 +170,17 @@ static __u32 ShiftsGE(__u32 x)
 /* Function to return the number of shifts to get a 1 in bit 0
  */
 
-static __u32 ShiftDiv(__u32 x)
+static __u32 Shifts(__u32 x)
 {
 	int nShifts;
 
 	nShifts =  0;
 
-	if(!x) return 0;
+	if (!x)
+		return 0;
 
-	while( !(x&1)){
-		x>>=1;
+	while (!(x&1)) {
+		x >>= 1;
 		nShifts++;
 	}
 
@@ -195,21 +198,25 @@ static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
 	int i;
 	__u8 *buf = (__u8 *)1;
 
-	memset(dev->tempBuffer,0,sizeof(dev->tempBuffer));
+	memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
 
 	for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
 		dev->tempBuffer[i].line = 0;	/* not in use */
 		dev->tempBuffer[i].buffer = buf =
-		    YMALLOC_DMA(dev->nDataBytesPerChunk);
+		    YMALLOC_DMA(dev->totalBytesPerChunk);
 	}
 
 	return buf ? YAFFS_OK : YAFFS_FAIL;
-
 }
 
-static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
+__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
 {
 	int i, j;
+
+	dev->tempInUse++;
+	if (dev->tempInUse > dev->maxTemp)
+		dev->maxTemp = dev->tempInUse;
+
 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
 		if (dev->tempBuffer[i].line == 0) {
 			dev->tempBuffer[i].line = lineNo;
@@ -227,9 +234,9 @@ static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
 	T(YAFFS_TRACE_BUFFERS,
 	  (TSTR("Out of temp buffers at line %d, other held by lines:"),
 	   lineNo));
-	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
 		T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
-	}
+
 	T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
 
 	/*
@@ -242,10 +249,13 @@ static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
 
 }
 
-static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
+void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
 				    int lineNo)
 {
 	int i;
+
+	dev->tempInUse--;
+
 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
 		if (dev->tempBuffer[i].buffer == buffer) {
 			dev->tempBuffer[i].line = 0;
@@ -267,27 +277,26 @@ static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
 /*
  * Determine if we have a managed buffer.
  */
-int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer)
+int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
 {
 	int i;
+
 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
 		if (dev->tempBuffer[i].buffer == buffer)
 			return 1;
-
 	}
 
-    for (i = 0; i < dev->nShortOpCaches; i++) {
-        if( dev->srCache[i].data == buffer )
-            return 1;
-
-    }
+	for (i = 0; i < dev->nShortOpCaches; i++) {
+		if (dev->srCache[i].data == buffer)
+			return 1;
+	}
 
-    if (buffer == dev->checkpointBuffer)
-      return 1;
+	if (buffer == dev->checkpointBuffer)
+		return 1;
 
-    T(YAFFS_TRACE_ALWAYS,
-	  (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
-    return 0;
+	T(YAFFS_TRACE_ALWAYS,
+		(TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
+	return 0;
 }
 
 
@@ -296,62 +305,63 @@ int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer)
  * Chunk bitmap manipulations
  */
 
-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk)
+static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
 {
 	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
 		T(YAFFS_TRACE_ERROR,
-		  (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
-		   blk));
+			(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+			blk));
 		YBUG();
 	}
 	return dev->chunkBits +
-	    (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+		(dev->chunkBitmapStride * (blk - dev->internalStartBlock));
 }
 
 static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
 {
-	if(blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
-	   chunk < 0 || chunk >= dev->nChunksPerBlock) {
-	   T(YAFFS_TRACE_ERROR,
-	    (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk));
-	    YBUG();
+	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
+			chunk < 0 || chunk >= dev->nChunksPerBlock) {
+		T(YAFFS_TRACE_ERROR,
+		(TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
+			blk, chunk));
+		YBUG();
 	}
 }
 
-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk)
+static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
 {
 	__u8 *blkBits = yaffs_BlockBits(dev, blk);
 
 	memset(blkBits, 0, dev->chunkBitmapStride);
 }
 
-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk)
+static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
 {
 	__u8 *blkBits = yaffs_BlockBits(dev, blk);
 
-	yaffs_VerifyChunkBitId(dev,blk,chunk);
+	yaffs_VerifyChunkBitId(dev, blk, chunk);
 
 	blkBits[chunk / 8] &= ~(1 << (chunk & 7));
 }
 
-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk)
+static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
 {
 	__u8 *blkBits = yaffs_BlockBits(dev, blk);
 
-	yaffs_VerifyChunkBitId(dev,blk,chunk);
+	yaffs_VerifyChunkBitId(dev, blk, chunk);
 
 	blkBits[chunk / 8] |= (1 << (chunk & 7));
 }
 
-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk)
+static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
 {
 	__u8 *blkBits = yaffs_BlockBits(dev, blk);
-	yaffs_VerifyChunkBitId(dev,blk,chunk);
+	yaffs_VerifyChunkBitId(dev, blk, chunk);
 
 	return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
 }
 
-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk)
+static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
 {
 	__u8 *blkBits = yaffs_BlockBits(dev, blk);
 	int i;
@@ -363,17 +373,17 @@ static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk)
 	return 0;
 }
 
-static int yaffs_CountChunkBits(yaffs_Device * dev, int blk)
+static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
 {
 	__u8 *blkBits = yaffs_BlockBits(dev, blk);
 	int i;
 	int n = 0;
 	for (i = 0; i < dev->chunkBitmapStride; i++) {
 		__u8 x = *blkBits;
-		while(x){
-			if(x & 1)
+		while (x) {
+			if (x & 1)
 				n++;
-			x >>=1;
+			x >>= 1;
 		}
 
 		blkBits++;
@@ -400,7 +410,7 @@ static int yaffs_SkipNANDVerification(yaffs_Device *dev)
 	return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
 }
 
-static const char * blockStateName[] = {
+static const char *blockStateName[] = {
 "Unknown",
 "Needs scanning",
 "Scanning",
@@ -413,64 +423,65 @@ static const char * blockStateName[] = {
 "Dead"
 };
 
-static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
+static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
 {
 	int actuallyUsed;
 	int inUse;
 
-	if(yaffs_SkipVerification(dev))
+	if (yaffs_SkipVerification(dev))
 		return;
 
 	/* Report illegal runtime states */
-	if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
-		T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState));
+	if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
 
-	switch(bi->blockState){
-	 case YAFFS_BLOCK_STATE_UNKNOWN:
-	 case YAFFS_BLOCK_STATE_SCANNING:
-	 case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
-		T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR),
-		n,blockStateName[bi->blockState]));
+	switch (bi->blockState) {
+	case YAFFS_BLOCK_STATE_UNKNOWN:
+	case YAFFS_BLOCK_STATE_SCANNING:
+	case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
+		n, blockStateName[bi->blockState]));
 	}
 
 	/* Check pages in use and soft deletions are legal */
 
 	actuallyUsed = bi->pagesInUse - bi->softDeletions;
 
-	if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
+	if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
 	   bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
 	   actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
-		T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
-		n,bi->pagesInUse,bi->softDeletions));
+		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
+		n, bi->pagesInUse, bi->softDeletions));
 
 
 	/* Check chunk bitmap legal */
-	inUse = yaffs_CountChunkBits(dev,n);
-	if(inUse != bi->pagesInUse)
-		T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
-			n,bi->pagesInUse,inUse));
+	inUse = yaffs_CountChunkBits(dev, n);
+	if (inUse != bi->pagesInUse)
+		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
+			n, bi->pagesInUse, inUse));
 
 	/* Check that the sequence number is valid.
 	 * Ten million is legal, but is very unlikely
 	 */
-	if(dev->isYaffs2 &&
+	if (dev->isYaffs2 &&
 	   (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
-	   (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 ))
-		T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR),
-		n,bi->sequenceNumber));
-
+	   (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
+		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
+		n, bi->sequenceNumber));
 }
 
-static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
+static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
+		int n)
 {
-	yaffs_VerifyBlock(dev,bi,n);
+	yaffs_VerifyBlock(dev, bi, n);
 
 	/* After collection the block should be in the erased state */
-	/* TODO: This will need to change if we do partial gc */
+	/* This will need to change if we do partial gc */
 
-	if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){
-		T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
-			n,bi->blockState));
+	if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
+			bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
+		T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+			n, bi->blockState));
 	}
 }
 
@@ -480,52 +491,49 @@ static void yaffs_VerifyBlocks(yaffs_Device *dev)
 	int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
 	int nIllegalBlockStates = 0;
 
-
-	if(yaffs_SkipVerification(dev))
+	if (yaffs_SkipVerification(dev))
 		return;
 
-	memset(nBlocksPerState,0,sizeof(nBlocksPerState));
-
+	memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
 
-	for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){
-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
-		yaffs_VerifyBlock(dev,bi,i);
+	for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+		yaffs_VerifyBlock(dev, bi, i);
 
-		if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+		if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
 			nBlocksPerState[bi->blockState]++;
 		else
 			nIllegalBlockStates++;
-
 	}
 
-	T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR)));
-	T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR)));
+	T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+	T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
 
-	T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates));
-	if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
-		T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR)));
+	T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
+	if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
+		T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
 
-	for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+	for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
 		T(YAFFS_TRACE_VERIFY,
 		  (TSTR("%s %d blocks"TENDSTR),
-		  blockStateName[i],nBlocksPerState[i]));
+		  blockStateName[i], nBlocksPerState[i]));
 
-	if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
+	if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
 		T(YAFFS_TRACE_VERIFY,
 		 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
 		 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
 
-	if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
+	if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
 		T(YAFFS_TRACE_VERIFY,
 		 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
 		 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
 
-	if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
+	if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
 		T(YAFFS_TRACE_VERIFY,
 		 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
 		 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
 
-	T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR)));
+	T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
 
 }
 
@@ -535,26 +543,26 @@ static void yaffs_VerifyBlocks(yaffs_Device *dev)
  */
 static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
 {
-	if(yaffs_SkipVerification(obj->myDev))
+	if (obj && yaffs_SkipVerification(obj->myDev))
 		return;
 
-	if(!(tags && obj && oh)){
-	 	T(YAFFS_TRACE_VERIFY,
-		 		(TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
-		 		(__u32)tags,(__u32)obj,(__u32)oh));
+	if (!(tags && obj && oh)) {
+		T(YAFFS_TRACE_VERIFY,
+				(TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
+				(__u32)tags, (__u32)obj, (__u32)oh));
 		return;
 	}
 
-	if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
-	   oh->type > YAFFS_OBJECT_TYPE_MAX)
-	 	T(YAFFS_TRACE_VERIFY,
-		 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
-		 tags->objectId, oh->type));
+	if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
+			oh->type > YAFFS_OBJECT_TYPE_MAX)
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
+			tags->objectId, oh->type));
 
-	if(tags->objectId != obj->objectId)
-	 	T(YAFFS_TRACE_VERIFY,
-		 (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
-		 tags->objectId, obj->objectId));
+	if (tags->objectId != obj->objectId)
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+			tags->objectId, obj->objectId));
 
 
 	/*
@@ -563,46 +571,43 @@ static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh,
 	 * Tests do not apply to the root object.
 	 */
 
-	if(parentCheck && tags->objectId > 1 && !obj->parent)
-	 	T(YAFFS_TRACE_VERIFY,
-		 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
-	 	 tags->objectId, oh->parentObjectId));
-
-
-	if(parentCheck && obj->parent &&
-	   oh->parentObjectId != obj->parent->objectId &&
-	   (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
-	    obj->parent->objectId != YAFFS_OBJECTID_DELETED))
-	 	T(YAFFS_TRACE_VERIFY,
-		 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
-	 	 tags->objectId, oh->parentObjectId, obj->parent->objectId));
+	if (parentCheck && tags->objectId > 1 && !obj->parent)
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
+			tags->objectId, oh->parentObjectId));
 
+	if (parentCheck && obj->parent &&
+			oh->parentObjectId != obj->parent->objectId &&
+			(oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
+			obj->parent->objectId != YAFFS_OBJECTID_DELETED))
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
+			tags->objectId, oh->parentObjectId, obj->parent->objectId));
 
-	if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+	if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
 		T(YAFFS_TRACE_VERIFY,
-		(TSTR("Obj %d header name is NULL"TENDSTR),
-		 obj->objectId));
+			(TSTR("Obj %d header name is NULL"TENDSTR),
+			obj->objectId));
 
-	if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
+	if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
 		T(YAFFS_TRACE_VERIFY,
-		(TSTR("Obj %d header name is 0xFF"TENDSTR),
-		 obj->objectId));
+			(TSTR("Obj %d header name is 0xFF"TENDSTR),
+			obj->objectId));
 }
 
 
 
-static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn,
-				  	__u32 level, int chunkOffset)
+static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
+					__u32 level, int chunkOffset)
 {
 	int i;
 	yaffs_Device *dev = obj->myDev;
 	int ok = 1;
-	int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
 
 	if (tn) {
 		if (level > 0) {
 
-			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
+			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
 				if (tn->internal[i]) {
 					ok = yaffs_VerifyTnodeWorker(obj,
 							tn->internal[i],
@@ -611,20 +616,19 @@ static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn,
 				}
 			}
 		} else if (level == 0) {
-			int i;
 			yaffs_ExtendedTags tags;
 			__u32 objectId = obj->objectId;
 
 			chunkOffset <<=  YAFFS_TNODES_LEVEL0_BITS;
 
-			for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){
-				__u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+			for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+				__u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
 
-				if(theChunk > 0){
+				if (theChunk > 0) {
 					/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
-					yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
-					if(tags.objectId != objectId || tags.chunkId != chunkOffset){
-						T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+					yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+					if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
+						T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
 							objectId, chunkOffset, theChunk,
 							tags.objectId, tags.chunkId));
 					}
@@ -646,13 +650,15 @@ static void yaffs_VerifyFile(yaffs_Object *obj)
 	__u32 lastChunk;
 	__u32 x;
 	__u32 i;
-	int ok;
 	yaffs_Device *dev;
 	yaffs_ExtendedTags tags;
 	yaffs_Tnode *tn;
 	__u32 objectId;
 
-	if(obj && yaffs_SkipVerification(obj->myDev))
+	if (!obj)
+		return;
+
+	if (yaffs_SkipVerification(obj->myDev))
 		return;
 
 	dev = obj->myDev;
@@ -662,17 +668,17 @@ static void yaffs_VerifyFile(yaffs_Object *obj)
 	lastChunk =  obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
 	x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
 	requiredTallness = 0;
-	while (x> 0) {
+	while (x > 0) {
 		x >>= YAFFS_TNODES_INTERNAL_BITS;
 		requiredTallness++;
 	}
 
 	actualTallness = obj->variant.fileVariant.topLevel;
 
-	if(requiredTallness > actualTallness )
+	if (requiredTallness > actualTallness)
 		T(YAFFS_TRACE_VERIFY,
 		(TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
-		 obj->objectId,actualTallness, requiredTallness));
+		 obj->objectId, actualTallness, requiredTallness));
 
 
 	/* Check that the chunks in the tnode tree are all correct.
@@ -680,39 +686,31 @@ static void yaffs_VerifyFile(yaffs_Object *obj)
 	 * checking the tags for every chunk match.
 	 */
 
-	if(yaffs_SkipNANDVerification(dev))
+	if (yaffs_SkipNANDVerification(dev))
 		return;
 
-	for(i = 1; i <= lastChunk; i++){
-		tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i);
+	for (i = 1; i <= lastChunk; i++) {
+		tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
 
 		if (tn) {
-			__u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
-			if(theChunk > 0){
+			__u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+			if (theChunk > 0) {
 				/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
-				yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
-				if(tags.objectId != objectId || tags.chunkId != i){
-					T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+				yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+				if (tags.objectId != objectId || tags.chunkId != i) {
+					T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
 						objectId, i, theChunk,
 						tags.objectId, tags.chunkId));
 				}
 			}
 		}
-
 	}
-
 }
 
-static void yaffs_VerifyDirectory(yaffs_Object *obj)
-{
-	if(obj && yaffs_SkipVerification(obj->myDev))
-		return;
-
-}
 
 static void yaffs_VerifyHardLink(yaffs_Object *obj)
 {
-	if(obj && yaffs_SkipVerification(obj->myDev))
+	if (obj && yaffs_SkipVerification(obj->myDev))
 		return;
 
 	/* Verify sane equivalent object */
@@ -720,7 +718,7 @@ static void yaffs_VerifyHardLink(yaffs_Object *obj)
 
 static void yaffs_VerifySymlink(yaffs_Object *obj)
 {
-	if(obj && yaffs_SkipVerification(obj->myDev))
+	if (obj && yaffs_SkipVerification(obj->myDev))
 		return;
 
 	/* Verify symlink string */
@@ -728,7 +726,7 @@ static void yaffs_VerifySymlink(yaffs_Object *obj)
 
 static void yaffs_VerifySpecial(yaffs_Object *obj)
 {
-	if(obj && yaffs_SkipVerification(obj->myDev))
+	if (obj && yaffs_SkipVerification(obj->myDev))
 		return;
 }
 
@@ -740,14 +738,19 @@ static void yaffs_VerifyObject(yaffs_Object *obj)
 	__u32 chunkMax;
 
 	__u32 chunkIdOk;
-	__u32 chunkIsLive;
+	__u32 chunkInRange;
+	__u32 chunkShouldNotBeDeleted;
+	__u32 chunkValid;
 
-	if(!obj)
+	if (!obj)
+		return;
+
+	if (obj->beingCreated)
 		return;
 
 	dev = obj->myDev;
 
-	if(yaffs_SkipVerification(dev))
+	if (yaffs_SkipVerification(dev))
 		return;
 
 	/* Check sane object header chunk */
@@ -755,50 +758,54 @@ static void yaffs_VerifyObject(yaffs_Object *obj)
 	chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
 	chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
 
-	chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax);
-	chunkIsLive = chunkIdOk &&
+	chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+	chunkIdOk = chunkInRange || obj->hdrChunk == 0;
+	chunkValid = chunkInRange &&
 			yaffs_CheckChunkBit(dev,
-					    obj->chunkId / dev->nChunksPerBlock,
-					    obj->chunkId % dev->nChunksPerBlock);
-	if(!obj->fake &&
-	    (!chunkIdOk || !chunkIsLive)) {
-	   T(YAFFS_TRACE_VERIFY,
-	   (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
-	   obj->objectId,obj->chunkId,
-	   chunkIdOk ? "" : ",out of range",
-	   chunkIsLive || !chunkIdOk ? "" : ",marked as deleted"));
-	}
-
-	if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) {
+					obj->hdrChunk / dev->nChunksPerBlock,
+					obj->hdrChunk % dev->nChunksPerBlock);
+	chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
+
+	if (!obj->fake &&
+			(!chunkIdOk || chunkShouldNotBeDeleted)) {
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+			obj->objectId, obj->hdrChunk,
+			chunkIdOk ? "" : ",out of range",
+			chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+	}
+
+	if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
 		yaffs_ExtendedTags tags;
 		yaffs_ObjectHeader *oh;
-		__u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
+		__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
 
 		oh = (yaffs_ObjectHeader *)buffer;
 
-		yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags);
+		yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
+				&tags);
 
-		yaffs_VerifyObjectHeader(obj,oh,&tags,1);
+		yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
 
-		yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
+		yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
 	}
 
 	/* Verify it has a parent */
-	if(obj && !obj->fake &&
-	   (!obj->parent || obj->parent->myDev != dev)){
-	   T(YAFFS_TRACE_VERIFY,
-	   (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
-	   obj->objectId,obj->parent));
+	if (obj && !obj->fake &&
+			(!obj->parent || obj->parent->myDev != dev)) {
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
+			obj->objectId, obj->parent));
 	}
 
 	/* Verify parent is a directory */
-	if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){
-	   T(YAFFS_TRACE_VERIFY,
-	   (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
-	   obj->objectId,obj->parent->variantType));
+	if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+		T(YAFFS_TRACE_VERIFY,
+			(TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
+			obj->objectId, obj->parent->variantType));
 	}
 
-	switch(obj->variantType){
+	switch (obj->variantType) {
 	case YAFFS_OBJECT_TYPE_FILE:
 		yaffs_VerifyFile(obj);
 		break;
@@ -818,33 +825,30 @@ static void yaffs_VerifyObject(yaffs_Object *obj)
 	default:
 		T(YAFFS_TRACE_VERIFY,
 		(TSTR("Obj %d has illegaltype %d"TENDSTR),
-		obj->objectId,obj->variantType));
+		obj->objectId, obj->variantType));
 		break;
 	}
-
-
 }
 
 static void yaffs_VerifyObjects(yaffs_Device *dev)
 {
 	yaffs_Object *obj;
 	int i;
-	struct list_head *lh;
+	struct ylist_head *lh;
 
-	if(yaffs_SkipVerification(dev))
+	if (yaffs_SkipVerification(dev))
 		return;
 
 	/* Iterate through the objects in each hash entry */
 
-	 for(i = 0; i <  YAFFS_NOBJECT_BUCKETS; i++){
-	 	list_for_each(lh, &dev->objectBucket[i].list) {
+	for (i = 0; i <  YAFFS_NOBJECT_BUCKETS; i++) {
+		ylist_for_each(lh, &dev->objectBucket[i].list) {
 			if (lh) {
-				obj = list_entry(lh, yaffs_Object, hashLink);
+				obj = ylist_entry(lh, yaffs_Object, hashLink);
 				yaffs_VerifyObject(obj);
 			}
 		}
-	 }
-
+	}
 }
 
 
@@ -855,19 +859,20 @@ static void yaffs_VerifyObjects(yaffs_Device *dev)
 static Y_INLINE int yaffs_HashFunction(int n)
 {
 	n = abs(n);
-	return (n % YAFFS_NOBJECT_BUCKETS);
+	return n % YAFFS_NOBJECT_BUCKETS;
 }
 
 /*
- * Access functions to useful fake objects
+ * Access functions to useful fake objects.
+ * Note that root might have a presence in NAND if permissions are set.
  */
 
-yaffs_Object *yaffs_Root(yaffs_Device * dev)
+yaffs_Object *yaffs_Root(yaffs_Device *dev)
 {
 	return dev->rootDir;
 }
 
-yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
+yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
 {
 	return dev->lostNFoundDir;
 }
@@ -877,7 +882,7 @@ yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
  *  Erased NAND checking functions
  */
 
-int yaffs_CheckFF(__u8 * buffer, int nBytes)
+int yaffs_CheckFF(__u8 *buffer, int nBytes)
 {
 	/* Horrible, slow implementation */
 	while (nBytes--) {
@@ -889,9 +894,8 @@ int yaffs_CheckFF(__u8 * buffer, int nBytes)
 }
 
 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
-				  int chunkInNAND)
+				int chunkInNAND)
 {
-
 	int retval = YAFFS_OK;
 	__u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
 	yaffs_ExtendedTags tags;
@@ -899,10 +903,9 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
 
 	result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
 
-	if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
+	if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
 		retval = YAFFS_FAIL;
 
-
 	if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
 		T(YAFFS_TRACE_NANDACCESS,
 		  (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
@@ -915,11 +918,10 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
 
 }
 
-
 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
-					     const __u8 * data,
-					     yaffs_ExtendedTags * tags,
-					     int useReserve)
+					const __u8 *data,
+					yaffs_ExtendedTags *tags,
+					int useReserve)
 {
 	int attempts = 0;
 	int writeOk = 0;
@@ -972,7 +974,7 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
 			erasedOk = yaffs_CheckChunkErased(dev, chunk);
 			if (erasedOk != YAFFS_OK) {
 				T(YAFFS_TRACE_ERROR,
-				(TSTR ("**>> yaffs chunk %d was not erased"
+				(TSTR("**>> yaffs chunk %d was not erased"
 				TENDSTR), chunk));
 
 				/* try another chunk */
@@ -992,7 +994,11 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
 		/* Copy the data into the robustification buffer */
 		yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
 
-	} while (writeOk != YAFFS_OK && attempts < yaffs_wr_attempts);
+	} while (writeOk != YAFFS_OK &&
+		(yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+
+	if (!writeOk)
+		chunk = -1;
 
 	if (attempts > 1) {
 		T(YAFFS_TRACE_ERROR,
@@ -1009,13 +1015,35 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
  * Block retiring for handling a broken block.
  */
 
-static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
+static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
 {
 	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
 
 	yaffs_InvalidateCheckpoint(dev);
 
-	yaffs_MarkBlockBad(dev, blockInNAND);
+	if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
+		if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
+			T(YAFFS_TRACE_ALWAYS, (TSTR(
+				"yaffs: Failed to mark bad and erase block %d"
+				TENDSTR), blockInNAND));
+		} else {
+			yaffs_ExtendedTags tags;
+			int chunkId = blockInNAND * dev->nChunksPerBlock;
+
+			__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+			memset(buffer, 0xff, dev->nDataBytesPerChunk);
+			yaffs_InitialiseTags(&tags);
+			tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
+			if (dev->writeChunkWithTagsToNAND(dev, chunkId -
+				dev->chunkOffset, buffer, &tags) != YAFFS_OK)
+				T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
+					TCONT("write bad block marker to block %d")
+					TENDSTR), blockInNAND));
+
+			yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+		}
+	}
 
 	bi->blockState = YAFFS_BLOCK_STATE_DEAD;
 	bi->gcPrioritise = 0;
@@ -1029,49 +1057,45 @@ static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
  *
  */
 
-static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
-				     const __u8 * data,
-				     const yaffs_ExtendedTags * tags)
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+				const __u8 *data,
+				const yaffs_ExtendedTags *tags)
 {
 }
 
-static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
-				    const yaffs_ExtendedTags * tags)
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+				const yaffs_ExtendedTags *tags)
 {
 }
 
 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
 {
-	if(!bi->gcPrioritise){
+	if (!bi->gcPrioritise) {
 		bi->gcPrioritise = 1;
 		dev->hasPendingPrioritisedGCs = 1;
-		bi->chunkErrorStrikes ++;
+		bi->chunkErrorStrikes++;
 
-		if(bi->chunkErrorStrikes > 3){
+		if (bi->chunkErrorStrikes > 3) {
 			bi->needsRetiring = 1; /* Too many stikes, so retire this */
 			T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
 
 		}
-
 	}
 }
 
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk)
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+		int erasedOk)
 {
-
 	int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
 	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
 
-	yaffs_HandleChunkError(dev,bi);
-
+	yaffs_HandleChunkError(dev, bi);
 
-	if(erasedOk ) {
+	if (erasedOk) {
 		/* Was an actual write failure, so mark the block for retirement  */
 		bi->needsRetiring = 1;
 		T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
 		  (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
-
-
 	}
 
 	/* Delete the chunk */
@@ -1081,12 +1105,12 @@ static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int
 
 /*---------------- Name handling functions ------------*/
 
-static __u16 yaffs_CalcNameSum(const YCHAR * name)
+static __u16 yaffs_CalcNameSum(const YCHAR *name)
 {
 	__u16 sum = 0;
 	__u16 i = 1;
 
-	YUCHAR *bname = (YUCHAR *) name;
+	const YUCHAR *bname = (const YUCHAR *) name;
 	if (bname) {
 		while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
 
@@ -1102,14 +1126,14 @@ static __u16 yaffs_CalcNameSum(const YCHAR * name)
 	return sum;
 }
 
-static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name)
+static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
 {
 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
-	if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) {
+	memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+	if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
 		yaffs_strcpy(obj->shortName, name);
-	} else {
+	else
 		obj->shortName[0] = _Y('\0');
-	}
 #endif
 	obj->sum = yaffs_CalcNameSum(name);
 }
@@ -1126,7 +1150,7 @@ static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name)
  * Don't use this function directly
  */
 
-static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
+static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
 {
 	int i;
 	int tnodeSize;
@@ -1143,6 +1167,9 @@ static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
 	 * Must be a multiple of 32-bits  */
 	tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
 
+	if (tnodeSize < sizeof(yaffs_Tnode))
+		tnodeSize = sizeof(yaffs_Tnode);
+
 	/* make these things */
 
 	newTnodes = YMALLOC(nTnodes * tnodeSize);
@@ -1150,7 +1177,7 @@ static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
 
 	if (!newTnodes) {
 		T(YAFFS_TRACE_ERROR,
-		  (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+			(TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
 		return YAFFS_FAIL;
 	}
 
@@ -1170,7 +1197,7 @@ static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
 	dev->freeTnodes = newTnodes;
 #else
 	/* New hookup for wide tnodes */
-	for(i = 0; i < nTnodes -1; i++) {
+	for (i = 0; i < nTnodes - 1; i++) {
 		curr = (yaffs_Tnode *) &mem[i * tnodeSize];
 		next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
 		curr->internal[0] = next;
@@ -1197,7 +1224,6 @@ static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
 		  (TSTR
 		   ("yaffs: Could not add tnodes to management list" TENDSTR)));
 		   return YAFFS_FAIL;
-
 	} else {
 		tnl->tnodes = newTnodes;
 		tnl->next = dev->allocatedTnodeList;
@@ -1211,14 +1237,13 @@ static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
 
 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
 
-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev)
+static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
 {
 	yaffs_Tnode *tn = NULL;
 
 	/* If there are none left make more */
-	if (!dev->freeTnodes) {
+	if (!dev->freeTnodes)
 		yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
-	}
 
 	if (dev->freeTnodes) {
 		tn = dev->freeTnodes;
@@ -1233,21 +1258,27 @@ static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev)
 		dev->nFreeTnodes--;
 	}
 
+	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
 	return tn;
 }
 
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
+static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
 {
 	yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+	int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
 
-	if(tn)
-		memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+	if (tnodeSize < sizeof(yaffs_Tnode))
+		tnodeSize = sizeof(yaffs_Tnode);
+
+	if (tn)
+		memset(tn, 0, tnodeSize);
 
 	return tn;
 }
 
 /* FreeTnode frees up a tnode and puts it back on the free list */
-static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn)
+static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
 {
 	if (tn) {
 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
@@ -1262,9 +1293,10 @@ static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn)
 		dev->freeTnodes = tn;
 		dev->nFreeTnodes++;
 	}
+	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
 }
 
-static void yaffs_DeinitialiseTnodes(yaffs_Device * dev)
+static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
 {
 	/* Free the list of allocated tnodes */
 	yaffs_TnodeList *tmp;
@@ -1282,71 +1314,72 @@ static void yaffs_DeinitialiseTnodes(yaffs_Device * dev)
 	dev->nFreeTnodes = 0;
 }
 
-static void yaffs_InitialiseTnodes(yaffs_Device * dev)
+static void yaffs_InitialiseTnodes(yaffs_Device *dev)
 {
 	dev->allocatedTnodeList = NULL;
 	dev->freeTnodes = NULL;
 	dev->nFreeTnodes = 0;
 	dev->nTnodesCreated = 0;
-
 }
 
 
-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val)
+void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
+		unsigned val)
 {
-  __u32 *map = (__u32 *)tn;
-  __u32 bitInMap;
-  __u32 bitInWord;
-  __u32 wordInMap;
-  __u32 mask;
+	__u32 *map = (__u32 *)tn;
+	__u32 bitInMap;
+	__u32 bitInWord;
+	__u32 wordInMap;
+	__u32 mask;
 
-  pos &= YAFFS_TNODES_LEVEL0_MASK;
-  val >>= dev->chunkGroupBits;
+	pos &= YAFFS_TNODES_LEVEL0_MASK;
+	val >>= dev->chunkGroupBits;
 
-  bitInMap = pos * dev->tnodeWidth;
-  wordInMap = bitInMap /32;
-  bitInWord = bitInMap & (32 -1);
+	bitInMap = pos * dev->tnodeWidth;
+	wordInMap = bitInMap / 32;
+	bitInWord = bitInMap & (32 - 1);
 
-  mask = dev->tnodeMask << bitInWord;
+	mask = dev->tnodeMask << bitInWord;
 
-  map[wordInMap] &= ~mask;
-  map[wordInMap] |= (mask & (val << bitInWord));
+	map[wordInMap] &= ~mask;
+	map[wordInMap] |= (mask & (val << bitInWord));
 
-  if(dev->tnodeWidth > (32-bitInWord)) {
-    bitInWord = (32 - bitInWord);
-    wordInMap++;;
-    mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
-    map[wordInMap] &= ~mask;
-    map[wordInMap] |= (mask & (val >> bitInWord));
-  }
+	if (dev->tnodeWidth > (32 - bitInWord)) {
+		bitInWord = (32 - bitInWord);
+		wordInMap++;;
+		mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+		map[wordInMap] &= ~mask;
+		map[wordInMap] |= (mask & (val >> bitInWord));
+	}
 }
 
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos)
+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+		unsigned pos)
 {
-  __u32 *map = (__u32 *)tn;
-  __u32 bitInMap;
-  __u32 bitInWord;
-  __u32 wordInMap;
-  __u32 val;
+	__u32 *map = (__u32 *)tn;
+	__u32 bitInMap;
+	__u32 bitInWord;
+	__u32 wordInMap;
+	__u32 val;
 
-  pos &= YAFFS_TNODES_LEVEL0_MASK;
+	pos &= YAFFS_TNODES_LEVEL0_MASK;
 
-  bitInMap = pos * dev->tnodeWidth;
-  wordInMap = bitInMap /32;
-  bitInWord = bitInMap & (32 -1);
+	bitInMap = pos * dev->tnodeWidth;
+	wordInMap = bitInMap / 32;
+	bitInWord = bitInMap & (32 - 1);
 
-  val = map[wordInMap] >> bitInWord;
+	val = map[wordInMap] >> bitInWord;
 
-  if(dev->tnodeWidth > (32-bitInWord)) {
-    bitInWord = (32 - bitInWord);
-    wordInMap++;;
-    val |= (map[wordInMap] << bitInWord);
-  }
+	if	(dev->tnodeWidth > (32 - bitInWord)) {
+		bitInWord = (32 - bitInWord);
+		wordInMap++;;
+		val |= (map[wordInMap] << bitInWord);
+	}
 
-  val &= dev->tnodeMask;
-  val <<= dev->chunkGroupBits;
+	val &= dev->tnodeMask;
+	val <<= dev->chunkGroupBits;
 
-  return val;
+	return val;
 }
 
 /* ------------------- End of individual tnode manipulation -----------------*/
@@ -1357,24 +1390,21 @@ static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigne
  */
 
 /* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
-					  yaffs_FileStructure * fStruct,
-					  __u32 chunkId)
+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+					yaffs_FileStructure *fStruct,
+					__u32 chunkId)
 {
-
 	yaffs_Tnode *tn = fStruct->top;
 	__u32 i;
 	int requiredTallness;
 	int level = fStruct->topLevel;
 
 	/* Check sane level and chunk Id */
-	if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) {
+	if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
 		return NULL;
-	}
 
-	if (chunkId > YAFFS_MAX_CHUNK_ID) {
+	if (chunkId > YAFFS_MAX_CHUNK_ID)
 		return NULL;
-	}
 
 	/* First check we're tall enough (ie enough topLevel) */
 
@@ -1385,22 +1415,17 @@ static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
 		requiredTallness++;
 	}
 
-	if (requiredTallness > fStruct->topLevel) {
-		/* Not tall enough, so we can't find it, return NULL. */
-		return NULL;
-	}
+	if (requiredTallness > fStruct->topLevel)
+		return NULL; /* Not tall enough, so we can't find it */
 
 	/* Traverse down to level 0 */
 	while (level > 0 && tn) {
-		tn = tn->
-		    internal[(chunkId >>
-			       ( YAFFS_TNODES_LEVEL0_BITS +
-			         (level - 1) *
-			         YAFFS_TNODES_INTERNAL_BITS)
-			      ) &
-			     YAFFS_TNODES_INTERNAL_MASK];
+		tn = tn->internal[(chunkId >>
+			(YAFFS_TNODES_LEVEL0_BITS +
+				(level - 1) *
+				YAFFS_TNODES_INTERNAL_BITS)) &
+			YAFFS_TNODES_INTERNAL_MASK];
 		level--;
-
 	}
 
 	return tn;
@@ -1417,12 +1442,11 @@ static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
  *  be plugged into the ttree.
  */
 
-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
-					       yaffs_FileStructure * fStruct,
-					       __u32 chunkId,
-					       yaffs_Tnode *passedTn)
+static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+					yaffs_FileStructure *fStruct,
+					__u32 chunkId,
+					yaffs_Tnode *passedTn)
 {
-
 	int requiredTallness;
 	int i;
 	int l;
@@ -1432,13 +1456,11 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
 
 
 	/* Check sane level and page Id */
-	if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) {
+	if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
 		return NULL;
-	}
 
-	if (chunkId > YAFFS_MAX_CHUNK_ID) {
+	if (chunkId > YAFFS_MAX_CHUNK_ID)
 		return NULL;
-	}
 
 	/* First check we're tall enough (ie enough topLevel) */
 
@@ -1451,7 +1473,7 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
 
 
 	if (requiredTallness > fStruct->topLevel) {
-		/* Not tall enough,gotta make the tree taller */
+		/* Not tall enough, gotta make the tree taller */
 		for (i = fStruct->topLevel; i < requiredTallness; i++) {
 
 			tn = yaffs_GetTnode(dev);
@@ -1473,27 +1495,27 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
 	l = fStruct->topLevel;
 	tn = fStruct->top;
 
-	if(l > 0) {
+	if (l > 0) {
 		while (l > 0 && tn) {
 			x = (chunkId >>
-			     ( YAFFS_TNODES_LEVEL0_BITS +
+			     (YAFFS_TNODES_LEVEL0_BITS +
 			      (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
 			    YAFFS_TNODES_INTERNAL_MASK;
 
 
-			if((l>1) && !tn->internal[x]){
+			if ((l > 1) && !tn->internal[x]) {
 				/* Add missing non-level-zero tnode */
 				tn->internal[x] = yaffs_GetTnode(dev);
 
-			} else if(l == 1) {
+			} else if (l == 1) {
 				/* Looking from level 1 at level 0 */
-			 	if (passedTn) {
+				if (passedTn) {
 					/* If we already have one, then release it.*/
-					if(tn->internal[x])
-						yaffs_FreeTnode(dev,tn->internal[x]);
+					if (tn->internal[x])
+						yaffs_FreeTnode(dev, tn->internal[x]);
 					tn->internal[x] = passedTn;
 
-				} else if(!tn->internal[x]) {
+				} else if (!tn->internal[x]) {
 					/* Don't have one, none passed in */
 					tn->internal[x] = yaffs_GetTnode(dev);
 				}
@@ -1504,31 +1526,29 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
 		}
 	} else {
 		/* top is level 0 */
-		if(passedTn) {
-			memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
-			yaffs_FreeTnode(dev,passedTn);
+		if (passedTn) {
+			memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+			yaffs_FreeTnode(dev, passedTn);
 		}
 	}
 
 	return tn;
 }
 
-static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk,
-				  yaffs_ExtendedTags * tags, int objectId,
-				  int chunkInInode)
+static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
+				yaffs_ExtendedTags *tags, int objectId,
+				int chunkInInode)
 {
 	int j;
 
 	for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
-		if (yaffs_CheckChunkBit
-		    (dev, theChunk / dev->nChunksPerBlock,
-		     theChunk % dev->nChunksPerBlock)) {
+		if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
+				theChunk % dev->nChunksPerBlock)) {
 			yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
 							tags);
 			if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
 				/* found it; */
 				return theChunk;
-
 			}
 		}
 		theChunk++;
@@ -1543,7 +1563,7 @@ static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk,
  * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
  */
 
-static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
+static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
 			      int chunkOffset, int *limit)
 {
 	int i;
@@ -1557,7 +1577,6 @@ static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
 
 	if (tn) {
 		if (level > 0) {
-
 			for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
 			     i--) {
 				if (tn->internal[i]) {
@@ -1565,17 +1584,17 @@ static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
 						allDone = 0;
 					} else {
 						allDone =
-						    yaffs_DeleteWorker(in,
-								       tn->
-								       internal
-								       [i],
-								       level -
-								       1,
-								       (chunkOffset
+							yaffs_DeleteWorker(in,
+								tn->
+								internal
+								[i],
+								level -
+								1,
+								(chunkOffset
 									<<
 									YAFFS_TNODES_INTERNAL_BITS)
-								       + i,
-								       limit);
+								+ i,
+								limit);
 					}
 					if (allDone) {
 						yaffs_FreeTnode(dev,
@@ -1584,27 +1603,25 @@ static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
 						tn->internal[i] = NULL;
 					}
 				}
-
 			}
 			return (allDone) ? 1 : 0;
 		} else if (level == 0) {
 			int hitLimit = 0;
 
 			for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
-			     i--) {
-			        theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+					i--) {
+				theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
 				if (theChunk) {
 
-					chunkInInode =
-					    (chunkOffset <<
-					     YAFFS_TNODES_LEVEL0_BITS) + i;
+					chunkInInode = (chunkOffset <<
+						YAFFS_TNODES_LEVEL0_BITS) + i;
 
 					foundChunk =
-					    yaffs_FindChunkInGroup(dev,
-								   theChunk,
-								   &tags,
-								   in->objectId,
-								   chunkInInode);
+						yaffs_FindChunkInGroup(dev,
+								theChunk,
+								&tags,
+								in->objectId,
+								chunkInInode);
 
 					if (foundChunk > 0) {
 						yaffs_DeleteChunk(dev,
@@ -1613,14 +1630,13 @@ static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
 						in->nDataChunks--;
 						if (limit) {
 							*limit = *limit - 1;
-							if (*limit <= 0) {
+							if (*limit <= 0)
 								hitLimit = 1;
-							}
 						}
 
 					}
 
-					yaffs_PutLevel0Tnode(dev,tn,i,0);
+					yaffs_PutLevel0Tnode(dev, tn, i, 0);
 				}
 
 			}
@@ -1634,9 +1650,8 @@ static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
 
 }
 
-static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk)
+static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
 {
-
 	yaffs_BlockInfo *theBlock;
 
 	T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
@@ -1654,7 +1669,7 @@ static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk)
  * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
  */
 
-static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn,
+static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
 				  __u32 level, int chunkOffset)
 {
 	int i;
@@ -1691,14 +1706,14 @@ static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn,
 		} else if (level == 0) {
 
 			for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
-				theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+				theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
 				if (theChunk) {
 					/* Note this does not find the real chunk, only the chunk group.
 					 * We make an assumption that a chunk group is not larger than
 					 * a block.
 					 */
 					yaffs_SoftDeleteChunk(dev, theChunk);
-					yaffs_PutLevel0Tnode(dev,tn,i,0);
+					yaffs_PutLevel0Tnode(dev, tn, i, 0);
 				}
 
 			}
@@ -1712,7 +1727,7 @@ static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn,
 
 }
 
-static void yaffs_SoftDeleteFile(yaffs_Object * obj)
+static void yaffs_SoftDeleteFile(yaffs_Object *obj)
 {
 	if (obj->deleted &&
 	    obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
@@ -1746,8 +1761,8 @@ static void yaffs_SoftDeleteFile(yaffs_Object * obj)
  * by a special case.
  */
 
-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn,
-				      __u32 level, int del0)
+static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
+				__u32 level, int del0)
 {
 	int i;
 	int hasData;
@@ -1763,9 +1778,8 @@ static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn,
 						      (i == 0) ? del0 : 1);
 			}
 
-			if (tn->internal[i]) {
+			if (tn->internal[i])
 				hasData++;
-			}
 		}
 
 		if (hasData == 0 && del0) {
@@ -1781,8 +1795,8 @@ static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn,
 
 }
 
-static int yaffs_PruneFileStructure(yaffs_Device * dev,
-				    yaffs_FileStructure * fStruct)
+static int yaffs_PruneFileStructure(yaffs_Device *dev,
+				yaffs_FileStructure *fStruct)
 {
 	int i;
 	int hasData;
@@ -1805,9 +1819,8 @@ static int yaffs_PruneFileStructure(yaffs_Device * dev,
 
 			hasData = 0;
 			for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
-				if (tn->internal[i]) {
+				if (tn->internal[i])
 					hasData++;
-				}
 			}
 
 			if (!hasData) {
@@ -1828,7 +1841,7 @@ static int yaffs_PruneFileStructure(yaffs_Device * dev,
 /* yaffs_CreateFreeObjects creates a bunch more objects and
  * adds them to the object free list.
  */
-static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects)
+static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
 {
 	int i;
 	yaffs_Object *newObjects;
@@ -1842,9 +1855,9 @@ static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects)
 	list = YMALLOC(sizeof(yaffs_ObjectList));
 
 	if (!newObjects || !list) {
-		if(newObjects)
+		if (newObjects)
 			YFREE(newObjects);
-		if(list)
+		if (list)
 			YFREE(list);
 		T(YAFFS_TRACE_ALLOCATE,
 		  (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
@@ -1854,7 +1867,7 @@ static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects)
 	/* Hook them into the free list */
 	for (i = 0; i < nObjects - 1; i++) {
 		newObjects[i].siblings.next =
-		    (struct list_head *)(&newObjects[i + 1]);
+				(struct ylist_head *)(&newObjects[i + 1]);
 	}
 
 	newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
@@ -1873,85 +1886,109 @@ static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects)
 
 
 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev)
+static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
 {
 	yaffs_Object *tn = NULL;
 
+#ifdef VALGRIND_TEST
+	tn = YMALLOC(sizeof(yaffs_Object));
+#else
 	/* If there are none left make more */
-	if (!dev->freeObjects) {
+	if (!dev->freeObjects)
 		yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
-	}
 
 	if (dev->freeObjects) {
 		tn = dev->freeObjects;
 		dev->freeObjects =
-		    (yaffs_Object *) (dev->freeObjects->siblings.next);
+			(yaffs_Object *) (dev->freeObjects->siblings.next);
 		dev->nFreeObjects--;
-
+	}
+#endif
+	if (tn) {
 		/* Now sweeten it up... */
 
 		memset(tn, 0, sizeof(yaffs_Object));
+		tn->beingCreated = 1;
+
 		tn->myDev = dev;
-		tn->chunkId = -1;
+		tn->hdrChunk = 0;
 		tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
-		INIT_LIST_HEAD(&(tn->hardLinks));
-		INIT_LIST_HEAD(&(tn->hashLink));
-		INIT_LIST_HEAD(&tn->siblings);
+		YINIT_LIST_HEAD(&(tn->hardLinks));
+		YINIT_LIST_HEAD(&(tn->hashLink));
+		YINIT_LIST_HEAD(&tn->siblings);
+
+
+		/* Now make the directory sane */
+		if (dev->rootDir) {
+			tn->parent = dev->rootDir;
+			ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
+		}
 
 		/* Add it to the lost and found directory.
 		 * NB Can't put root or lostNFound in lostNFound so
 		 * check if lostNFound exists first
 		 */
-		if (dev->lostNFoundDir) {
+		if (dev->lostNFoundDir)
 			yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
-		}
+
+		tn->beingCreated = 0;
 	}
 
+	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
 	return tn;
 }
 
-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number,
+static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
 					       __u32 mode)
 {
 
 	yaffs_Object *obj =
 	    yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
 	if (obj) {
-		obj->fake = 1;		/* it is fake so it has no NAND presence... */
+		obj->fake = 1;		/* it is fake so it might have no NAND presence... */
 		obj->renameAllowed = 0;	/* ... and we're not allowed to rename it... */
 		obj->unlinkAllowed = 0;	/* ... or unlink it */
 		obj->deleted = 0;
 		obj->unlinked = 0;
 		obj->yst_mode = mode;
 		obj->myDev = dev;
-		obj->chunkId = 0;	/* Not a valid chunk. */
+		obj->hdrChunk = 0;	/* Not a valid chunk. */
 	}
 
 	return obj;
 
 }
 
-static void yaffs_UnhashObject(yaffs_Object * tn)
+static void yaffs_UnhashObject(yaffs_Object *tn)
 {
 	int bucket;
 	yaffs_Device *dev = tn->myDev;
 
 	/* If it is still linked into the bucket list, free from the list */
-	if (!list_empty(&tn->hashLink)) {
-		list_del_init(&tn->hashLink);
+	if (!ylist_empty(&tn->hashLink)) {
+		ylist_del_init(&tn->hashLink);
 		bucket = yaffs_HashFunction(tn->objectId);
 		dev->objectBucket[bucket].count--;
 	}
-
 }
 
 /*  FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_FreeObject(yaffs_Object * tn)
+static void yaffs_FreeObject(yaffs_Object *tn)
 {
-
 	yaffs_Device *dev = tn->myDev;
 
-#ifdef  __KERNEL__
+#ifdef __KERNEL__
+	T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
+#endif
+
+	if (tn->parent)
+		YBUG();
+	if (!ylist_empty(&tn->siblings))
+		YBUG();
+
+
+#ifdef __KERNEL__
 	if (tn->myInode) {
 		/* We're still hooked up to a cached inode.
 		 * Don't delete now, but mark for later deletion
@@ -1963,24 +2000,28 @@ static void yaffs_FreeObject(yaffs_Object * tn)
 
 	yaffs_UnhashObject(tn);
 
+#ifdef VALGRIND_TEST
+	YFREE(tn);
+#else
 	/* Link into the free list. */
-	tn->siblings.next = (struct list_head *)(dev->freeObjects);
+	tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
 	dev->freeObjects = tn;
 	dev->nFreeObjects++;
+#endif
+	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
 }
 
 #ifdef __KERNEL__
 
-void yaffs_HandleDeferedFree(yaffs_Object * obj)
+void yaffs_HandleDeferedFree(yaffs_Object *obj)
 {
-	if (obj->deferedFree) {
+	if (obj->deferedFree)
 		yaffs_FreeObject(obj);
-	}
 }
 
 #endif
 
-static void yaffs_DeinitialiseObjects(yaffs_Device * dev)
+static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
 {
 	/* Free the list of allocated Objects */
 
@@ -1998,7 +2039,7 @@ static void yaffs_DeinitialiseObjects(yaffs_Device * dev)
 	dev->nFreeObjects = 0;
 }
 
-static void yaffs_InitialiseObjects(yaffs_Device * dev)
+static void yaffs_InitialiseObjects(yaffs_Device *dev)
 {
 	int i;
 
@@ -2007,15 +2048,14 @@ static void yaffs_InitialiseObjects(yaffs_Device * dev)
 	dev->nFreeObjects = 0;
 
 	for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-		INIT_LIST_HEAD(&dev->objectBucket[i].list);
+		YINIT_LIST_HEAD(&dev->objectBucket[i].list);
 		dev->objectBucket[i].count = 0;
 	}
-
 }
 
-static int yaffs_FindNiceObjectBucket(yaffs_Device * dev)
+static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
 {
-	static int x = 0;
+	static int x;
 	int i;
 	int l = 999;
 	int lowest = 999999;
@@ -2049,7 +2089,7 @@ static int yaffs_FindNiceObjectBucket(yaffs_Device * dev)
 	return l;
 }
 
-static int yaffs_CreateNewObjectNumber(yaffs_Device * dev)
+static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
 {
 	int bucket = yaffs_FindNiceObjectBucket(dev);
 
@@ -2058,7 +2098,7 @@ static int yaffs_CreateNewObjectNumber(yaffs_Device * dev)
 	 */
 
 	int found = 0;
-	struct list_head *i;
+	struct ylist_head *i;
 
 	__u32 n = (__u32) bucket;
 
@@ -2068,41 +2108,38 @@ static int yaffs_CreateNewObjectNumber(yaffs_Device * dev)
 		found = 1;
 		n += YAFFS_NOBJECT_BUCKETS;
 		if (1 || dev->objectBucket[bucket].count > 0) {
-			list_for_each(i, &dev->objectBucket[bucket].list) {
+			ylist_for_each(i, &dev->objectBucket[bucket].list) {
 				/* If there is already one in the list */
-				if (i
-				    && list_entry(i, yaffs_Object,
-						  hashLink)->objectId == n) {
+				if (i && ylist_entry(i, yaffs_Object,
+						hashLink)->objectId == n) {
 					found = 0;
 				}
 			}
 		}
 	}
 
-
 	return n;
 }
 
-static void yaffs_HashObject(yaffs_Object * in)
+static void yaffs_HashObject(yaffs_Object *in)
 {
 	int bucket = yaffs_HashFunction(in->objectId);
 	yaffs_Device *dev = in->myDev;
 
-	list_add(&in->hashLink, &dev->objectBucket[bucket].list);
+	ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
 	dev->objectBucket[bucket].count++;
-
 }
 
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number)
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
 {
 	int bucket = yaffs_HashFunction(number);
-	struct list_head *i;
+	struct ylist_head *i;
 	yaffs_Object *in;
 
-	list_for_each(i, &dev->objectBucket[bucket].list) {
+	ylist_for_each(i, &dev->objectBucket[bucket].list) {
 		/* Look if it is in the list */
 		if (i) {
-			in = list_entry(i, yaffs_Object, hashLink);
+			in = ylist_entry(i, yaffs_Object, hashLink);
 			if (in->objectId == number) {
 #ifdef __KERNEL__
 				/* Don't tell the VFS about this one if it is defered free */
@@ -2118,31 +2155,27 @@ yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number)
 	return NULL;
 }
 
-yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
+yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
 				    yaffs_ObjectType type)
 {
-
 	yaffs_Object *theObject;
-	yaffs_Tnode *tn;
+	yaffs_Tnode *tn = NULL;
 
-	if (number < 0) {
+	if (number < 0)
 		number = yaffs_CreateNewObjectNumber(dev);
-	}
 
 	theObject = yaffs_AllocateEmptyObject(dev);
-	if(!theObject)
+	if (!theObject)
 		return NULL;
 
-	if(type == YAFFS_OBJECT_TYPE_FILE){
+	if (type == YAFFS_OBJECT_TYPE_FILE) {
 		tn = yaffs_GetTnode(dev);
-		if(!tn){
+		if (!tn) {
 			yaffs_FreeObject(theObject);
 			return NULL;
 		}
 	}
 
-
-
 	if (theObject) {
 		theObject->fake = 0;
 		theObject->renameAllowed = 1;
@@ -2171,8 +2204,8 @@ yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
 			theObject->variant.fileVariant.top = tn;
 			break;
 		case YAFFS_OBJECT_TYPE_DIRECTORY:
-			INIT_LIST_HEAD(&theObject->variant.directoryVariant.
-				       children);
+			YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+					children);
 			break;
 		case YAFFS_OBJECT_TYPE_SYMLINK:
 		case YAFFS_OBJECT_TYPE_HARDLINK:
@@ -2188,32 +2221,30 @@ yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
 	return theObject;
 }
 
-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev,
+static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
 						      int number,
 						      yaffs_ObjectType type)
 {
 	yaffs_Object *theObject = NULL;
 
-	if (number > 0) {
+	if (number > 0)
 		theObject = yaffs_FindObjectByNumber(dev, number);
-	}
 
-	if (!theObject) {
+	if (!theObject)
 		theObject = yaffs_CreateNewObject(dev, number, type);
-	}
 
 	return theObject;
 
 }
 
 
-static YCHAR *yaffs_CloneString(const YCHAR * str)
+static YCHAR *yaffs_CloneString(const YCHAR *str)
 {
 	YCHAR *newStr = NULL;
 
 	if (str && *str) {
 		newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
-		if(newStr)
+		if (newStr)
 			yaffs_strcpy(newStr, str);
 	}
 
@@ -2229,29 +2260,31 @@ static YCHAR *yaffs_CloneString(const YCHAR * str)
  */
 
 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
-				       yaffs_Object * parent,
-				       const YCHAR * name,
+				       yaffs_Object *parent,
+				       const YCHAR *name,
 				       __u32 mode,
 				       __u32 uid,
 				       __u32 gid,
-				       yaffs_Object * equivalentObject,
-				       const YCHAR * aliasString, __u32 rdev)
+				       yaffs_Object *equivalentObject,
+				       const YCHAR *aliasString, __u32 rdev)
 {
 	yaffs_Object *in;
-	YCHAR *str;
+	YCHAR *str = NULL;
 
 	yaffs_Device *dev = parent->myDev;
 
 	/* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
-	if (yaffs_FindObjectByName(parent, name)) {
+	if (yaffs_FindObjectByName(parent, name))
 		return NULL;
-	}
 
 	in = yaffs_CreateNewObject(dev, -1, type);
 
-	if(type == YAFFS_OBJECT_TYPE_SYMLINK){
+	if (!in)
+		return YAFFS_FAIL;
+
+	if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
 		str = yaffs_CloneString(aliasString);
-		if(!str){
+		if (!str) {
 			yaffs_FreeObject(in);
 			return NULL;
 		}
@@ -2260,7 +2293,7 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
 
 
 	if (in) {
-		in->chunkId = -1;
+		in->hdrChunk = 0;
 		in->valid = 1;
 		in->variantType = type;
 
@@ -2293,10 +2326,10 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
 			break;
 		case YAFFS_OBJECT_TYPE_HARDLINK:
 			in->variant.hardLinkVariant.equivalentObject =
-			    equivalentObject;
+				equivalentObject;
 			in->variant.hardLinkVariant.equivalentObjectId =
-			    equivalentObject->objectId;
-			list_add(&in->hardLinks, &equivalentObject->hardLinks);
+				equivalentObject->objectId;
+			ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
 			break;
 		case YAFFS_OBJECT_TYPE_FILE:
 		case YAFFS_OBJECT_TYPE_DIRECTORY:
@@ -2308,7 +2341,7 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
 
 		if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
 			/* Could not create the object header, fail the creation */
-			yaffs_DestroyObject(in);
+			yaffs_DeleteObject(in);
 			in = NULL;
 		}
 
@@ -2317,38 +2350,38 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
 	return in;
 }
 
-yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
-			      __u32 mode, __u32 uid, __u32 gid)
+yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+			__u32 mode, __u32 uid, __u32 gid)
 {
 	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
-				 uid, gid, NULL, NULL, 0);
+				uid, gid, NULL, NULL, 0);
 }
 
-yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
-				   __u32 mode, __u32 uid, __u32 gid)
+yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+				__u32 mode, __u32 uid, __u32 gid)
 {
 	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
 				 mode, uid, gid, NULL, NULL, 0);
 }
 
-yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
-				 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
+				__u32 mode, __u32 uid, __u32 gid, __u32 rdev)
 {
 	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
 				 uid, gid, NULL, NULL, rdev);
 }
 
-yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
-				 __u32 mode, __u32 uid, __u32 gid,
-				 const YCHAR * alias)
+yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
+				__u32 mode, __u32 uid, __u32 gid,
+				const YCHAR *alias)
 {
 	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
-				 uid, gid, NULL, alias, 0);
+				uid, gid, NULL, alias, 0);
 }
 
 /* yaffs_Link returns the object id of the equivalent object.*/
-yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
-			 yaffs_Object * equivalentObject)
+yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+			yaffs_Object *equivalentObject)
 {
 	/* Get the real object in case we were fed a hard link as an equivalent object */
 	equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
@@ -2363,33 +2396,31 @@ yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
 
 }
 
-static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir,
-				  const YCHAR * newName, int force, int shadows)
+static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
+				const YCHAR *newName, int force, int shadows)
 {
 	int unlinkOp;
 	int deleteOp;
 
 	yaffs_Object *existingTarget;
 
-	if (newDir == NULL) {
+	if (newDir == NULL)
 		newDir = obj->parent;	/* use the old directory */
-	}
 
 	if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
 		T(YAFFS_TRACE_ALWAYS,
 		  (TSTR
-		   ("tragendy: yaffs_ChangeObjectName: newDir is not a directory"
+		   ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
 		    TENDSTR)));
 		YBUG();
 	}
 
 	/* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
-	if (obj->myDev->isYaffs2) {
+	if (obj->myDev->isYaffs2)
 		unlinkOp = (newDir == obj->myDev->unlinkedDir);
-	} else {
+	else
 		unlinkOp = (newDir == obj->myDev->unlinkedDir
 			    && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
-	}
 
 	deleteOp = (newDir == obj->myDev->deletedDir);
 
@@ -2415,40 +2446,40 @@ static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir,
 			obj->unlinked = 1;
 
 		/* If it is a deletion then we mark it as a shrink for gc purposes. */
-		if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows)>= 0)
+		if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
 			return YAFFS_OK;
 	}
 
 	return YAFFS_FAIL;
 }
 
-int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
-		       yaffs_Object * newDir, const YCHAR * newName)
+int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+		yaffs_Object *newDir, const YCHAR *newName)
 {
-	yaffs_Object *obj;
-	yaffs_Object *existingTarget;
+	yaffs_Object *obj = NULL;
+	yaffs_Object *existingTarget = NULL;
 	int force = 0;
 
+
+	if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+		YBUG();
+	if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+		YBUG();
+
 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
 	/* Special case for case insemsitive systems (eg. WinCE).
 	 * While look-up is case insensitive, the name isn't.
 	 * Therefore we might want to change x.txt to X.txt
 	*/
-	if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) {
+	if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
 		force = 1;
-	}
 #endif
 
+	else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+		/* ENAMETOOLONG */
+		return YAFFS_FAIL;
+
 	obj = yaffs_FindObjectByName(oldDir, oldName);
-	/* Check new name to long. */
-	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK &&
-	    yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH)
-	  /* ENAMETOOLONG */
-	  return YAFFS_FAIL;
-	else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK &&
-		 yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
-	  /* ENAMETOOLONG */
-	  return YAFFS_FAIL;
 
 	if (obj && obj->renameAllowed) {
 
@@ -2456,8 +2487,8 @@ int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
 
 		existingTarget = yaffs_FindObjectByName(newDir, newName);
 		if (existingTarget &&
-		    existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
-		    !list_empty(&existingTarget->variant.directoryVariant.children)) {
+			existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+			!ylist_empty(&existingTarget->variant.directoryVariant.children)) {
 			/* There is a target that is a non-empty directory, so we fail */
 			return YAFFS_FAIL;	/* EEXIST or ENOTEMPTY */
 		} else if (existingTarget && existingTarget != obj) {
@@ -2465,7 +2496,7 @@ int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
 			 * but only if it isn't the same object
 			 */
 			yaffs_ChangeObjectName(obj, newDir, newName, force,
-					       existingTarget->objectId);
+						existingTarget->objectId);
 			yaffs_UnlinkObject(existingTarget);
 		}
 
@@ -2476,7 +2507,7 @@ int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
 
 /*------------------------- Block Management and Page Allocation ----------------*/
 
-static int yaffs_InitialiseBlocks(yaffs_Device * dev)
+static int yaffs_InitialiseBlocks(yaffs_Device *dev)
 {
 	int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
 
@@ -2487,23 +2518,20 @@ static int yaffs_InitialiseBlocks(yaffs_Device * dev)
 
 	/* If the first allocation strategy fails, thry the alternate one */
 	dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
-	if(!dev->blockInfo){
+	if (!dev->blockInfo) {
 		dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
 		dev->blockInfoAlt = 1;
-	}
-	else
+	} else
 		dev->blockInfoAlt = 0;
 
-	if(dev->blockInfo){
-
+	if (dev->blockInfo) {
 		/* Set up dynamic blockinfo stuff. */
 		dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
 		dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
-		if(!dev->chunkBits){
+		if (!dev->chunkBits) {
 			dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
 			dev->chunkBitsAlt = 1;
-		}
-		else
+		} else
 			dev->chunkBitsAlt = 0;
 	}
 
@@ -2514,30 +2542,29 @@ static int yaffs_InitialiseBlocks(yaffs_Device * dev)
 	}
 
 	return YAFFS_FAIL;
-
 }
 
-static void yaffs_DeinitialiseBlocks(yaffs_Device * dev)
+static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
 {
-	if(dev->blockInfoAlt && dev->blockInfo)
+	if (dev->blockInfoAlt && dev->blockInfo)
 		YFREE_ALT(dev->blockInfo);
-	else if(dev->blockInfo)
+	else if (dev->blockInfo)
 		YFREE(dev->blockInfo);
 
 	dev->blockInfoAlt = 0;
 
 	dev->blockInfo = NULL;
 
-	if(dev->chunkBitsAlt && dev->chunkBits)
+	if (dev->chunkBitsAlt && dev->chunkBits)
 		YFREE_ALT(dev->chunkBits);
-	else if(dev->chunkBits)
+	else if (dev->chunkBits)
 		YFREE(dev->chunkBits);
 	dev->chunkBitsAlt = 0;
 	dev->chunkBits = NULL;
 }
 
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev,
-					    yaffs_BlockInfo * bi)
+static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
+					yaffs_BlockInfo *bi)
 {
 	int i;
 	__u32 seq;
@@ -2556,7 +2583,7 @@ static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev,
 		seq = dev->sequenceNumber;
 
 		for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
-		     i++) {
+				i++) {
 			b = yaffs_GetBlockInfo(dev, i);
 			if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
 			    (b->pagesInUse - b->softDeletions) <
@@ -2571,38 +2598,36 @@ static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev,
 	 * discarded pages.
 	 */
 	return (bi->sequenceNumber <= dev->oldestDirtySequence);
-
 }
 
 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
  * for garbage collection.
  */
 
-static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
-					       int aggressive)
+static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+					int aggressive)
 {
-
 	int b = dev->currentDirtyChecker;
 
 	int i;
 	int iterations;
 	int dirtiest = -1;
 	int pagesInUse = 0;
-	int prioritised=0;
+	int prioritised = 0;
 	yaffs_BlockInfo *bi;
 	int pendingPrioritisedExist = 0;
 
 	/* First let's see if we need to grab a prioritised block */
-	if(dev->hasPendingPrioritisedGCs){
-		for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){
+	if (dev->hasPendingPrioritisedGCs) {
+		for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
 
 			bi = yaffs_GetBlockInfo(dev, i);
-			//yaffs_VerifyBlock(dev,bi,i);
+			/* yaffs_VerifyBlock(dev,bi,i); */
 
-			if(bi->gcPrioritise) {
+			if (bi->gcPrioritise) {
 				pendingPrioritisedExist = 1;
-				if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
-				   yaffs_BlockNotDisqualifiedFromGC(dev, bi)){
+				if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+				   yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
 					pagesInUse = (bi->pagesInUse - bi->softDeletions);
 					dirtiest = i;
 					prioritised = 1;
@@ -2611,7 +2636,7 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
 			}
 		}
 
-		if(!pendingPrioritisedExist) /* None found, so we can clear this */
+		if (!pendingPrioritisedExist) /* None found, so we can clear this */
 			dev->hasPendingPrioritisedGCs = 0;
 	}
 
@@ -2623,31 +2648,28 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
 
 	dev->nonAggressiveSkip--;
 
-	if (!aggressive && (dev->nonAggressiveSkip > 0)) {
+	if (!aggressive && (dev->nonAggressiveSkip > 0))
 		return -1;
-	}
 
-	if(!prioritised)
+	if (!prioritised)
 		pagesInUse =
-	    		(aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+			(aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
 
-	if (aggressive) {
+	if (aggressive)
 		iterations =
 		    dev->internalEndBlock - dev->internalStartBlock + 1;
-	} else {
+	else {
 		iterations =
 		    dev->internalEndBlock - dev->internalStartBlock + 1;
 		iterations = iterations / 16;
-		if (iterations > 200) {
+		if (iterations > 200)
 			iterations = 200;
-		}
 	}
 
 	for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
 		b++;
-		if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+		if (b < dev->internalStartBlock || b > dev->internalEndBlock)
 			b = dev->internalStartBlock;
-		}
 
 		if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
 			T(YAFFS_TRACE_ERROR,
@@ -2657,17 +2679,9 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
 
 		bi = yaffs_GetBlockInfo(dev, b);
 
-#if 0
-		if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
-			dirtiest = b;
-			pagesInUse = 0;
-		}
-		else
-#endif
-
 		if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
-		       (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
-		        yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+			(bi->pagesInUse - bi->softDeletions) < pagesInUse &&
+				yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
 			dirtiest = b;
 			pagesInUse = (bi->pagesInUse - bi->softDeletions);
 		}
@@ -2678,19 +2692,18 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
 	if (dirtiest > 0) {
 		T(YAFFS_TRACE_GC,
 		  (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
-		   dev->nChunksPerBlock - pagesInUse,prioritised));
+		   dev->nChunksPerBlock - pagesInUse, prioritised));
 	}
 
 	dev->oldestDirtySequence = 0;
 
-	if (dirtiest > 0) {
+	if (dirtiest > 0)
 		dev->nonAggressiveSkip = 4;
-	}
 
 	return dirtiest;
 }
 
-static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo)
+static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
 {
 	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
 
@@ -2752,7 +2765,7 @@ static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo)
 	}
 }
 
-static int yaffs_FindBlockForAllocation(yaffs_Device * dev)
+static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
 {
 	int i;
 
@@ -2763,7 +2776,7 @@ static int yaffs_FindBlockForAllocation(yaffs_Device * dev)
 		 * Can't get space to gc
 		 */
 		T(YAFFS_TRACE_ERROR,
-		  (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR)));
+		  (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
 
 		return -1;
 	}
@@ -2794,31 +2807,74 @@ static int yaffs_FindBlockForAllocation(yaffs_Device * dev)
 
 	T(YAFFS_TRACE_ALWAYS,
 	  (TSTR
-	   ("yaffs tragedy: no more eraased blocks, but there should have been %d"
+	   ("yaffs tragedy: no more erased blocks, but there should have been %d"
 	    TENDSTR), dev->nErasedBlocks));
 
 	return -1;
 }
 
 
-// Check if there's space to allocate...
-// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
-static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev)
+
+static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+{
+	if (!dev->nCheckpointBlocksRequired &&
+	   dev->isYaffs2) {
+		/* Not a valid value so recalculate */
+		int nBytes = 0;
+		int nBlocks;
+		int devBlocks = (dev->endBlock - dev->startBlock + 1);
+		int tnodeSize;
+
+		tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+		if (tnodeSize < sizeof(yaffs_Tnode))
+			tnodeSize = sizeof(yaffs_Tnode);
+
+		nBytes += sizeof(yaffs_CheckpointValidity);
+		nBytes += sizeof(yaffs_CheckpointDevice);
+		nBytes += devBlocks * sizeof(yaffs_BlockInfo);
+		nBytes += devBlocks * dev->chunkBitmapStride;
+		nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
+		nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
+		nBytes += sizeof(yaffs_CheckpointValidity);
+		nBytes += sizeof(__u32); /* checksum*/
+
+		/* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+
+		nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
+
+		dev->nCheckpointBlocksRequired = nBlocks;
+	}
+
+	return dev->nCheckpointBlocksRequired;
+}
+
+/*
+ * Check if there's space to allocate...
+ * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+ */
+static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
 {
 	int reservedChunks;
 	int reservedBlocks = dev->nReservedBlocks;
 	int checkpointBlocks;
 
-	checkpointBlocks =  dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
-	if(checkpointBlocks < 0)
+	if (dev->isYaffs2) {
+		checkpointBlocks =  yaffs_CalcCheckpointBlocksRequired(dev) -
+				    dev->blocksInCheckpoint;
+		if (checkpointBlocks < 0)
+			checkpointBlocks = 0;
+	} else {
 		checkpointBlocks = 0;
+	}
 
 	reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
 
 	return (dev->nFreeChunks > reservedChunks);
 }
 
-static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr)
+static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+		yaffs_BlockInfo **blockUsedPtr)
 {
 	int retVal;
 	yaffs_BlockInfo *bi;
@@ -2835,7 +2891,7 @@ static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockIn
 	}
 
 	if (dev->nErasedBlocks < dev->nReservedBlocks
-	    && dev->allocationPage == 0) {
+			&& dev->allocationPage == 0) {
 		T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
 	}
 
@@ -2844,10 +2900,10 @@ static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockIn
 		bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
 
 		retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
-		    dev->allocationPage;
+			dev->allocationPage;
 		bi->pagesInUse++;
 		yaffs_SetChunkBit(dev, dev->allocationBlock,
-				  dev->allocationPage);
+				dev->allocationPage);
 
 		dev->allocationPage++;
 
@@ -2859,43 +2915,43 @@ static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockIn
 			dev->allocationBlock = -1;
 		}
 
-		if(blockUsedPtr)
+		if (blockUsedPtr)
 			*blockUsedPtr = bi;
 
 		return retVal;
 	}
 
 	T(YAFFS_TRACE_ERROR,
-	  (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+			(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
 
 	return -1;
 }
 
-static int yaffs_GetErasedChunks(yaffs_Device * dev)
+static int yaffs_GetErasedChunks(yaffs_Device *dev)
 {
 	int n;
 
 	n = dev->nErasedBlocks * dev->nChunksPerBlock;
 
-	if (dev->allocationBlock > 0) {
+	if (dev->allocationBlock > 0)
 		n += (dev->nChunksPerBlock - dev->allocationPage);
-	}
 
 	return n;
 
 }
 
-static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
+static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
+		int wholeBlock)
 {
 	int oldChunk;
 	int newChunk;
-	int chunkInBlock;
 	int markNAND;
 	int retVal = YAFFS_OK;
 	int cleanups = 0;
 	int i;
 	int isCheckpointBlock;
 	int matchingChunk;
+	int maxCopies;
 
 	int chunksBefore = yaffs_GetErasedChunks(dev);
 	int chunksAfter;
@@ -2911,8 +2967,11 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 	bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
 
 	T(YAFFS_TRACE_TRACING,
-	  (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block,
-	   bi->pagesInUse, bi->hasShrinkHeader));
+			(TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+			 block,
+			 bi->pagesInUse,
+			 bi->hasShrinkHeader,
+			 wholeBlock));
 
 	/*yaffs_VerifyFreeChunks(dev); */
 
@@ -2926,26 +2985,33 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 	dev->isDoingGC = 1;
 
 	if (isCheckpointBlock ||
-	    !yaffs_StillSomeChunkBits(dev, block)) {
+			!yaffs_StillSomeChunkBits(dev, block)) {
 		T(YAFFS_TRACE_TRACING,
-		  (TSTR
-		   ("Collecting block %d that has no chunks in use" TENDSTR),
-		   block));
+				(TSTR
+				 ("Collecting block %d that has no chunks in use" TENDSTR),
+				 block));
 		yaffs_BlockBecameDirty(dev, block);
 	} else {
 
 		__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
 
-		yaffs_VerifyBlock(dev,bi,block);
+		yaffs_VerifyBlock(dev, bi, block);
+
+		maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
+		oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
 
-		for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock;
-		     chunkInBlock < dev->nChunksPerBlock
-		     && yaffs_StillSomeChunkBits(dev, block);
-		     chunkInBlock++, oldChunk++) {
-			if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) {
+		for (/* init already done */;
+		     retVal == YAFFS_OK &&
+		     dev->gcChunk < dev->nChunksPerBlock &&
+		     (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
+		     maxCopies > 0;
+		     dev->gcChunk++, oldChunk++) {
+			if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
 
 				/* This page is in use and might need to be copied off */
 
+				maxCopies--;
+
 				markNAND = 1;
 
 				yaffs_InitialiseTags(&tags);
@@ -2959,22 +3025,22 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 
 				T(YAFFS_TRACE_GC_DETAIL,
 				  (TSTR
-				   ("Collecting page %d, %d %d %d " TENDSTR),
-				   chunkInBlock, tags.objectId, tags.chunkId,
+				   ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+				   dev->gcChunk, tags.objectId, tags.chunkId,
 				   tags.byteCount));
 
-				if(object && !yaffs_SkipVerification(dev)){
-					if(tags.chunkId == 0)
-						matchingChunk = object->chunkId;
-					else if(object->softDeleted)
+				if (object && !yaffs_SkipVerification(dev)) {
+					if (tags.chunkId == 0)
+						matchingChunk = object->hdrChunk;
+					else if (object->softDeleted)
 						matchingChunk = oldChunk; /* Defeat the test */
 					else
-						matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL);
+						matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
 
-					if(oldChunk != matchingChunk)
+					if (oldChunk != matchingChunk)
 						T(YAFFS_TRACE_ERROR,
 						  (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
-						  oldChunk,matchingChunk,tags.objectId, tags.chunkId));
+						  oldChunk, matchingChunk, tags.objectId, tags.chunkId));
 
 				}
 
@@ -2986,9 +3052,11 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 					    tags.objectId, tags.chunkId, tags.byteCount));
 				}
 
-				if (object && object->deleted
-				    && tags.chunkId != 0) {
-					/* Data chunk in a deleted file, throw it away
+				if (object &&
+				    object->deleted &&
+				    object->softDeleted &&
+				    tags.chunkId != 0) {
+					/* Data chunk in a soft deleted file, throw it away
 					 * It's a soft deleted data chunk,
 					 * No need to copy this, just forget about it and
 					 * fix up the object.
@@ -3003,13 +3071,12 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 						cleanups++;
 					}
 					markNAND = 0;
-				} else if (0
-					   /* Todo object && object->deleted && object->nDataChunks == 0 */
-					   ) {
+				} else if (0) {
+					/* Todo object && object->deleted && object->nDataChunks == 0 */
 					/* Deleted object header with no data chunks.
 					 * Can be discarded and the file deleted.
 					 */
-					object->chunkId = 0;
+					object->hdrChunk = 0;
 					yaffs_FreeTnode(object->myDev,
 							object->variant.
 							fileVariant.top);
@@ -3031,17 +3098,14 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 						 * We need to nuke the shrinkheader flags first
 						 * We no longer want the shrinkHeader flag since its work is done
 						 * and if it is left in place it will mess up scanning.
-						 * Also, clear out any shadowing stuff
 						 */
 
 						yaffs_ObjectHeader *oh;
 						oh = (yaffs_ObjectHeader *)buffer;
 						oh->isShrink = 0;
-						oh->shadowsObject = -1;
-						tags.extraShadows = 0;
 						tags.extraIsShrinkHeader = 0;
 
-						yaffs_VerifyObjectHeader(object,oh,&tags,1);
+						yaffs_VerifyObjectHeader(object, oh, &tags, 1);
 					}
 
 					newChunk =
@@ -3055,7 +3119,7 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 
 						if (tags.chunkId == 0) {
 							/* It's a header */
-							object->chunkId =  newChunk;
+							object->hdrChunk =  newChunk;
 							object->serial =   tags.serialNumber;
 						} else {
 							/* It's a data chunk */
@@ -3067,7 +3131,8 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 					}
 				}
 
-				yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+				if (retVal == YAFFS_OK)
+					yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
 
 			}
 		}
@@ -3098,18 +3163,25 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
 
 	}
 
-	yaffs_VerifyCollectedBlock(dev,bi,block);
+	yaffs_VerifyCollectedBlock(dev, bi, block);
 
-	if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) {
+	chunksAfter = yaffs_GetErasedChunks(dev);
+	if (chunksBefore >= chunksAfter) {
 		T(YAFFS_TRACE_GC,
 		  (TSTR
 		   ("gc did not increase free chunks before %d after %d"
 		    TENDSTR), chunksBefore, chunksAfter));
 	}
 
+	/* If the gc completed then clear the current gcBlock so that we find another. */
+	if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
+		dev->gcBlock = -1;
+		dev->gcChunk = 0;
+	}
+
 	dev->isDoingGC = 0;
 
-	return YAFFS_OK;
+	return retVal;
 }
 
 /* New garbage collector
@@ -3121,7 +3193,7 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
  * The idea is to help clear out space in a more spread-out manner.
  * Dunno if it really does anything useful.
  */
-static int yaffs_CheckGarbageCollection(yaffs_Device * dev)
+static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
 {
 	int block;
 	int aggressive;
@@ -3142,8 +3214,8 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev)
 	do {
 		maxTries++;
 
-		checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint);
-		if(checkpointBlockAdjust < 0)
+		checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+		if (checkpointBlockAdjust < 0)
 			checkpointBlockAdjust = 0;
 
 		if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
@@ -3154,20 +3226,24 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev)
 			aggressive = 0;
 		}
 
-		block = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+		if (dev->gcBlock <= 0) {
+			dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+			dev->gcChunk = 0;
+		}
+
+		block = dev->gcBlock;
 
 		if (block > 0) {
 			dev->garbageCollections++;
-			if (!aggressive) {
+			if (!aggressive)
 				dev->passiveGarbageCollections++;
-			}
 
 			T(YAFFS_TRACE_GC,
 			  (TSTR
 			   ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
 			   dev->nErasedBlocks, aggressive));
 
-			gcOk = yaffs_GarbageCollectBlock(dev, block);
+			gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
 		}
 
 		if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
@@ -3176,15 +3252,16 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev)
 			   ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
 			    TENDSTR), dev->nErasedBlocks, maxTries, block));
 		}
-	} while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0)
-		 && (maxTries < 2));
+	} while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
+		 (block > 0) &&
+		 (maxTries < 2));
 
 	return aggressive ? gcOk : YAFFS_OK;
 }
 
 /*-------------------------  TAGS --------------------------------*/
 
-static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
+static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
 			   int chunkInObject)
 {
 	return (tags->chunkId == chunkInObject &&
@@ -3195,8 +3272,8 @@ static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
 
 /*-------------------- Data file manipulation -----------------*/
 
-static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
-				 yaffs_ExtendedTags * tags)
+static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+				 yaffs_ExtendedTags *tags)
 {
 	/*Get the Tnode, then get the level 0 offset chunk offset */
 	yaffs_Tnode *tn;
@@ -3214,7 +3291,7 @@ static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
 	tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
 
 	if (tn) {
-		theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
+		theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
 
 		retVal =
 		    yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
@@ -3223,8 +3300,8 @@ static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
 	return retVal;
 }
 
-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode,
-					  yaffs_ExtendedTags * tags)
+static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
+					  yaffs_ExtendedTags *tags)
 {
 	/* Get the Tnode, then get the level 0 offset chunk offset */
 	yaffs_Tnode *tn;
@@ -3243,29 +3320,23 @@ static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode,
 
 	if (tn) {
 
-		theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
+		theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
 
 		retVal =
 		    yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
 					   chunkInInode);
 
 		/* Delete the entry in the filestructure (if found) */
-		if (retVal != -1) {
-			yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0);
-		}
-	} else {
-		/*T(("No level 0 found for %d\n", chunkInInode)); */
+		if (retVal != -1)
+			yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
 	}
 
-	if (retVal == -1) {
-		/* T(("Could not find %d to delete\n",chunkInInode)); */
-	}
 	return retVal;
 }
 
 #ifdef YAFFS_PARANOID
 
-static int yaffs_CheckFileSanity(yaffs_Object * in)
+static int yaffs_CheckFileSanity(yaffs_Object *in)
 {
 	int chunk;
 	int nChunks;
@@ -3278,10 +3349,8 @@ static int yaffs_CheckFileSanity(yaffs_Object * in)
 	int theChunk;
 	int chunkDeleted;
 
-	if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
-		/* T(("Object not a file\n")); */
+	if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
 		return YAFFS_FAIL;
-	}
 
 	objId = in->objectId;
 	fSize = in->variant.fileVariant.fileSize;
@@ -3294,7 +3363,7 @@ static int yaffs_CheckFileSanity(yaffs_Object * in)
 
 		if (tn) {
 
-			theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk);
+			theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
 
 			if (yaffs_CheckChunkBits
 			    (dev, theChunk / dev->nChunksPerBlock,
@@ -3323,7 +3392,7 @@ static int yaffs_CheckFileSanity(yaffs_Object * in)
 
 #endif
 
-static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
+static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
 				  int chunkInNAND, int inScan)
 {
 	/* NB inScan is zero unless scanning.
@@ -3358,11 +3427,10 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
 					&in->variant.fileVariant,
 					chunkInInode,
 					NULL);
-	if (!tn) {
+	if (!tn)
 		return YAFFS_FAIL;
-	}
 
-	existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
+	existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
 
 	if (inScan != 0) {
 		/* If we're scanning then we need to test for duplicates
@@ -3374,7 +3442,7 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
 		 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
 		 */
 
-		if (existingChunk != 0) {
+		if (existingChunk > 0) {
 			/* NB Right now existing chunk will not be real chunkId if the device >= 32MB
 			 *    thus we have to do a FindChunkInFile to get the real chunk id.
 			 *
@@ -3411,8 +3479,10 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
 			 * not be loaded during a scan
 			 */
 
-			newSerial = newTags.serialNumber;
-			existingSerial = existingTags.serialNumber;
+			if (inScan > 0) {
+				newSerial = newTags.serialNumber;
+				existingSerial = existingTags.serialNumber;
+			}
 
 			if ((inScan > 0) &&
 			    (in->myDev->isYaffs2 ||
@@ -3437,24 +3507,23 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
 
 	}
 
-	if (existingChunk == 0) {
+	if (existingChunk == 0)
 		in->nDataChunks++;
-	}
 
-	yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND);
+	yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
 
 	return YAFFS_OK;
 }
 
-static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode,
-					 __u8 * buffer)
+static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
+					__u8 *buffer)
 {
 	int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
 
-	if (chunkInNAND >= 0) {
+	if (chunkInNAND >= 0)
 		return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
-						       buffer,NULL);
-	} else {
+						buffer, NULL);
+	else {
 		T(YAFFS_TRACE_NANDACCESS,
 		  (TSTR("Chunk %d not found zero instead" TENDSTR),
 		   chunkInNAND));
@@ -3465,7 +3534,7 @@ static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode,
 
 }
 
-void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn)
+void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
 {
 	int block;
 	int page;
@@ -3475,16 +3544,15 @@ void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn)
 	if (chunkId <= 0)
 		return;
 
-
 	dev->nDeletions++;
 	block = chunkId / dev->nChunksPerBlock;
 	page = chunkId % dev->nChunksPerBlock;
 
 
-	if(!yaffs_CheckChunkBit(dev,block,page))
+	if (!yaffs_CheckChunkBit(dev, block, page))
 		T(YAFFS_TRACE_VERIFY,
-		 	(TSTR("Deleting invalid chunk %d"TENDSTR),
-		 	 chunkId));
+			(TSTR("Deleting invalid chunk %d"TENDSTR),
+			 chunkId));
 
 	bi = yaffs_GetBlockInfo(dev, block);
 
@@ -3524,14 +3592,12 @@ void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn)
 			yaffs_BlockBecameDirty(dev, block);
 		}
 
-	} else {
-		/* T(("Bad news deleting chunk %d\n",chunkId)); */
 	}
 
 }
 
-static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode,
-					const __u8 * buffer, int nBytes,
+static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
+					const __u8 *buffer, int nBytes,
 					int useReserve)
 {
 	/* Find old chunk Need to do this to get serial number
@@ -3561,6 +3627,12 @@ static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode,
 	    (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
 	newTags.byteCount = nBytes;
 
+	if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
+		T(YAFFS_TRACE_ERROR,
+		(TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+		YBUG();
+	}
+
 	newChunkId =
 	    yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
 					      useReserve);
@@ -3568,11 +3640,9 @@ static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode,
 	if (newChunkId >= 0) {
 		yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
 
-		if (prevChunkId >= 0) {
+		if (prevChunkId >= 0)
 			yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
 
-		}
-
 		yaffs_CheckFileSanity(in);
 	}
 	return newChunkId;
@@ -3582,7 +3652,7 @@ static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode,
 /* UpdateObjectHeader updates the header on NAND for an object.
  * If name is not NULL, then that new name is used.
  */
-int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
+int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
 			     int isShrink, int shadows)
 {
 
@@ -3603,9 +3673,12 @@ int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
 
 	yaffs_ObjectHeader *oh = NULL;
 
-	yaffs_strcpy(oldName,"silly old name");
+	yaffs_strcpy(oldName, _Y("silly old name"));
+
 
-	if (!in->fake || force) {
+	if (!in->fake ||
+		in == dev->rootDir || /* The rootDir should also be saved */
+		force) {
 
 		yaffs_CheckGarbageCollection(dev);
 		yaffs_CheckObjectDetailsLoaded(in);
@@ -3613,13 +3686,13 @@ int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
 		buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
 		oh = (yaffs_ObjectHeader *) buffer;
 
-		prevChunkId = in->chunkId;
+		prevChunkId = in->hdrChunk;
 
-		if (prevChunkId >= 0) {
+		if (prevChunkId > 0) {
 			result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
 							buffer, &oldTags);
 
-			yaffs_VerifyObjectHeader(in,oh,&oldTags,0);
+			yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
 
 			memcpy(oldName, oh->name, sizeof(oh->name));
 		}
@@ -3628,7 +3701,7 @@ int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
 
 		oh->type = in->variantType;
 		oh->yst_mode = in->yst_mode;
-		oh->shadowsObject = shadows;
+		oh->shadowsObject = oh->inbandShadowsObject = shadows;
 
 #ifdef CONFIG_YAFFS_WINCE
 		oh->win_atime[0] = in->win_atime[0];
@@ -3645,20 +3718,18 @@ int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
 		oh->yst_ctime = in->yst_ctime;
 		oh->yst_rdev = in->yst_rdev;
 #endif
-		if (in->parent) {
+		if (in->parent)
 			oh->parentObjectId = in->parent->objectId;
-		} else {
+		else
 			oh->parentObjectId = 0;
-		}
 
 		if (name && *name) {
 			memset(oh->name, 0, sizeof(oh->name));
 			yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
-		} else if (prevChunkId>=0) {
+		} else if (prevChunkId >= 0)
 			memcpy(oh->name, oldName, sizeof(oh->name));
-		} else {
+		else
 			memset(oh->name, 0, sizeof(oh->name));
-		}
 
 		oh->isShrink = isShrink;
 
@@ -3708,7 +3779,7 @@ int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
 		newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
 		newTags.extraObjectType = in->variantType;
 
-		yaffs_VerifyObjectHeader(in,oh,&newTags,1);
+		yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
 
 		/* Create new chunk in NAND */
 		newChunkId =
@@ -3717,20 +3788,20 @@ int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
 
 		if (newChunkId >= 0) {
 
-			in->chunkId = newChunkId;
+			in->hdrChunk = newChunkId;
 
 			if (prevChunkId >= 0) {
 				yaffs_DeleteChunk(dev, prevChunkId, 1,
 						  __LINE__);
 			}
 
-			if(!yaffs_ObjectHasCachedWriteData(in))
+			if (!yaffs_ObjectHasCachedWriteData(in))
 				in->dirty = 0;
 
 			/* If this was a shrink, then mark the block that the chunk lives on */
 			if (isShrink) {
 				bi = yaffs_GetBlockInfo(in->myDev,
-							newChunkId /in->myDev->	nChunksPerBlock);
+					newChunkId / in->myDev->nChunksPerBlock);
 				bi->hasShrinkHeader = 1;
 			}
 
@@ -3766,7 +3837,7 @@ static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
 	yaffs_ChunkCache *cache;
 	int nCaches = obj->myDev->nShortOpCaches;
 
-	for(i = 0; i < nCaches; i++){
+	for (i = 0; i < nCaches; i++) {
 		cache = &dev->srCache[i];
 		if (cache->object == obj &&
 		    cache->dirty)
@@ -3777,7 +3848,7 @@ static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
 }
 
 
-static void yaffs_FlushFilesChunkCache(yaffs_Object * obj)
+static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
 {
 	yaffs_Device *dev = obj->myDev;
 	int lowest = -99;	/* Stop compiler whining. */
@@ -3844,16 +3915,16 @@ void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
 	 */
 	do {
 		obj = NULL;
-		for( i = 0; i < nCaches && !obj; i++) {
+		for (i = 0; i < nCaches && !obj; i++) {
 			if (dev->srCache[i].object &&
 			    dev->srCache[i].dirty)
 				obj = dev->srCache[i].object;
 
 		}
-		if(obj)
+		if (obj)
 			yaffs_FlushFilesChunkCache(obj);
 
-	} while(obj);
+	} while (obj);
 
 }
 
@@ -3863,41 +3934,21 @@ void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
  * Then look for the least recently used non-dirty one.
  * Then look for the least recently used dirty one...., flush and look again.
  */
-static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device * dev)
+static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
 {
 	int i;
-	int usage;
-	int theOne;
 
 	if (dev->nShortOpCaches > 0) {
 		for (i = 0; i < dev->nShortOpCaches; i++) {
 			if (!dev->srCache[i].object)
 				return &dev->srCache[i];
 		}
-
-		return NULL;
-
-		theOne = -1;
-		usage = 0;	/* just to stop the compiler grizzling */
-
-		for (i = 0; i < dev->nShortOpCaches; i++) {
-			if (!dev->srCache[i].dirty &&
-			    ((dev->srCache[i].lastUse < usage && theOne >= 0) ||
-			     theOne < 0)) {
-				usage = dev->srCache[i].lastUse;
-				theOne = i;
-			}
-		}
-
-
-		return theOne >= 0 ? &dev->srCache[theOne] : NULL;
-	} else {
-		return NULL;
 	}
 
+	return NULL;
 }
 
-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev)
+static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
 {
 	yaffs_ChunkCache *cache;
 	yaffs_Object *theObj;
@@ -3927,8 +3978,7 @@ static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev)
 			for (i = 0; i < dev->nShortOpCaches; i++) {
 				if (dev->srCache[i].object &&
 				    !dev->srCache[i].locked &&
-				    (dev->srCache[i].lastUse < usage || !cache))
-				{
+				    (dev->srCache[i].lastUse < usage || !cache)) {
 					usage = dev->srCache[i].lastUse;
 					theObj = dev->srCache[i].object;
 					cache = &dev->srCache[i];
@@ -3950,7 +4000,7 @@ static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev)
 }
 
 /* Find a cached chunk */
-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj,
+static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
 					      int chunkId)
 {
 	yaffs_Device *dev = obj->myDev;
@@ -3969,7 +4019,7 @@ static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj,
 }
 
 /* Mark the chunk for the least recently used algorithym */
-static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache,
+static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
 				int isAWrite)
 {
 
@@ -3977,9 +4027,9 @@ static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache,
 		if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
 			/* Reset the cache usages */
 			int i;
-			for (i = 1; i < dev->nShortOpCaches; i++) {
+			for (i = 1; i < dev->nShortOpCaches; i++)
 				dev->srCache[i].lastUse = 0;
-			}
+
 			dev->srLastUse = 0;
 		}
 
@@ -3987,9 +4037,8 @@ static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache,
 
 		cache->lastUse = dev->srLastUse;
 
-		if (isAWrite) {
+		if (isAWrite)
 			cache->dirty = 1;
-		}
 	}
 }
 
@@ -3997,21 +4046,20 @@ static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache,
  * Do this when a whole page gets written,
  * ie the short cache for this page is no longer valid.
  */
-static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId)
+static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
 {
 	if (object->myDev->nShortOpCaches > 0) {
 		yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
 
-		if (cache) {
+		if (cache)
 			cache->object = NULL;
-		}
 	}
 }
 
 /* Invalidate all the cache pages associated with this object
  * Do this whenever ther file is deleted or resized.
  */
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in)
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
 {
 	int i;
 	yaffs_Device *dev = in->myDev;
@@ -4019,9 +4067,8 @@ static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in)
 	if (dev->nShortOpCaches > 0) {
 		/* Invalidate it. */
 		for (i = 0; i < dev->nShortOpCaches; i++) {
-			if (dev->srCache[i].object == in) {
+			if (dev->srCache[i].object == in)
 				dev->srCache[i].object = NULL;
-			}
 		}
 	}
 }
@@ -4029,18 +4076,18 @@ static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in)
 /*--------------------- Checkpointing --------------------*/
 
 
-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head)
+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
 {
 	yaffs_CheckpointValidity cp;
 
-	memset(&cp,0,sizeof(cp));
+	memset(&cp, 0, sizeof(cp));
 
 	cp.structType = sizeof(cp);
 	cp.magic = YAFFS_MAGIC;
 	cp.version = YAFFS_CHECKPOINT_VERSION;
 	cp.head = (head) ? 1 : 0;
 
-	return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))?
+	return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
 		1 : 0;
 }
 
@@ -4049,9 +4096,9 @@ static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
 	yaffs_CheckpointValidity cp;
 	int ok;
 
-	ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
+	ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
 
-	if(ok)
+	if (ok)
 		ok = (cp.structType == sizeof(cp)) &&
 		     (cp.magic == YAFFS_MAGIC) &&
 		     (cp.version == YAFFS_CHECKPOINT_VERSION) &&
@@ -4100,21 +4147,21 @@ static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
 	int ok;
 
 	/* Write device runtime values*/
-	yaffs_DeviceToCheckpointDevice(&cp,dev);
+	yaffs_DeviceToCheckpointDevice(&cp, dev);
 	cp.structType = sizeof(cp);
 
-	ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
+	ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
 
 	/* Write block info */
-	if(ok) {
+	if (ok) {
 		nBytes = nBlocks * sizeof(yaffs_BlockInfo);
-		ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes);
+		ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
 	}
 
 	/* Write chunk bits */
-	if(ok) {
+	if (ok) {
 		nBytes = nBlocks * dev->chunkBitmapStride;
-		ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes);
+		ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
 	}
 	return	 ok ? 1 : 0;
 
@@ -4128,25 +4175,25 @@ static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
 
 	int ok;
 
-	ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
-	if(!ok)
+	ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+	if (!ok)
 		return 0;
 
-	if(cp.structType != sizeof(cp))
+	if (cp.structType != sizeof(cp))
 		return 0;
 
 
-	yaffs_CheckpointDeviceToDevice(dev,&cp);
+	yaffs_CheckpointDeviceToDevice(dev, &cp);
 
 	nBytes = nBlocks * sizeof(yaffs_BlockInfo);
 
-	ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes);
+	ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
 
-	if(!ok)
+	if (!ok)
 		return 0;
 	nBytes = nBlocks * dev->chunkBitmapStride;
 
-	ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes);
+	ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
 
 	return ok ? 1 : 0;
 }
@@ -4157,7 +4204,7 @@ static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
 
 	cp->objectId = obj->objectId;
 	cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
-	cp->chunkId = obj->chunkId;
+	cp->hdrChunk = obj->hdrChunk;
 	cp->variantType = obj->variantType;
 	cp->deleted = obj->deleted;
 	cp->softDeleted = obj->softDeleted;
@@ -4168,20 +4215,28 @@ static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
 	cp->serial = obj->serial;
 	cp->nDataChunks = obj->nDataChunks;
 
-	if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
 		cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
-	else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+	else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
 		cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
 }
 
-static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp)
+static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
 {
 
 	yaffs_Object *parent;
 
+	if (obj->variantType != cp->variantType) {
+		T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
+			TCONT("chunk %d does not match existing object type %d")
+			TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
+			obj->variantType));
+		return 0;
+	}
+
 	obj->objectId = cp->objectId;
 
-	if(cp->parentId)
+	if (cp->parentId)
 		parent = yaffs_FindOrCreateObjectByNumber(
 					obj->myDev,
 					cp->parentId,
@@ -4189,10 +4244,19 @@ static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointOb
 	else
 		parent = NULL;
 
-	if(parent)
+	if (parent) {
+		if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+			T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
+				TCONT(" chunk %d Parent type, %d, not directory")
+				TENDSTR),
+				cp->objectId, cp->parentId, cp->variantType,
+				cp->hdrChunk, parent->variantType));
+			return 0;
+		}
 		yaffs_AddObjectToDirectory(parent, obj);
+	}
 
-	obj->chunkId = cp->chunkId;
+	obj->hdrChunk = cp->hdrChunk;
 	obj->variantType = cp->variantType;
 	obj->deleted = cp->deleted;
 	obj->softDeleted = cp->softDeleted;
@@ -4203,29 +4267,34 @@ static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointOb
 	obj->serial = cp->serial;
 	obj->nDataChunks = cp->nDataChunks;
 
-	if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
 		obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
-	else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+	else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
 		obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
 
-	if(obj->objectId >= YAFFS_NOBJECT_BUCKETS)
+	if (obj->hdrChunk > 0)
 		obj->lazyLoaded = 1;
+	return 1;
 }
 
 
 
-static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn,
-				  	__u32 level, int chunkOffset)
+static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
+					__u32 level, int chunkOffset)
 {
 	int i;
 	yaffs_Device *dev = in->myDev;
 	int ok = 1;
-	int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+	int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+	if (tnodeSize < sizeof(yaffs_Tnode))
+		tnodeSize = sizeof(yaffs_Tnode);
+
 
 	if (tn) {
 		if (level > 0) {
 
-			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
+			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
 				if (tn->internal[i]) {
 					ok = yaffs_CheckpointTnodeWorker(in,
 							tn->internal[i],
@@ -4235,10 +4304,9 @@ static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn,
 			}
 		} else if (level == 0) {
 			__u32 baseOffset = chunkOffset <<  YAFFS_TNODES_LEVEL0_BITS;
-			/* printf("write tnode at %d\n",baseOffset); */
-			ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset));
-			if(ok)
-				ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes);
+			ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
+			if (ok)
+				ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
 		}
 	}
 
@@ -4251,13 +4319,13 @@ static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
 	__u32 endMarker = ~0;
 	int ok = 1;
 
-	if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){
+	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
 		ok = yaffs_CheckpointTnodeWorker(obj,
 					    obj->variant.fileVariant.top,
 					    obj->variant.fileVariant.topLevel,
 					    0);
-		if(ok)
-			ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) ==
+		if (ok)
+			ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
 				sizeof(endMarker));
 	}
 
@@ -4272,38 +4340,38 @@ static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
 	yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
 	yaffs_Tnode *tn;
 	int nread = 0;
+	int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
 
-	ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
+	if (tnodeSize < sizeof(yaffs_Tnode))
+		tnodeSize = sizeof(yaffs_Tnode);
 
-	while(ok && (~baseChunk)){
+	ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+
+	while (ok && (~baseChunk)) {
 		nread++;
 		/* Read level 0 tnode */
 
 
-		/* printf("read  tnode at %d\n",baseChunk); */
 		tn = yaffs_GetTnodeRaw(dev);
-		if(tn)
-			ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) ==
-			      (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+		if (tn)
+			ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
 		else
 			ok = 0;
 
-		if(tn && ok){
+		if (tn && ok)
 			ok = yaffs_AddOrFindLevel0Tnode(dev,
-					       		fileStructPtr,
-					       		baseChunk,
-					       		tn) ? 1 : 0;
+							fileStructPtr,
+							baseChunk,
+							tn) ? 1 : 0;
 
-		}
-
-		if(ok)
-			ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
+		if (ok)
+			ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
 
 	}
 
-	T(YAFFS_TRACE_CHECKPOINT,(
+	T(YAFFS_TRACE_CHECKPOINT, (
 		TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
-		nread,baseChunk,ok));
+		nread, baseChunk, ok));
 
 	return ok ? 1 : 0;
 }
@@ -4315,41 +4383,40 @@ static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
 	yaffs_CheckpointObject cp;
 	int i;
 	int ok = 1;
-	struct list_head *lh;
+	struct ylist_head *lh;
 
 
 	/* Iterate through the objects in each hash entry,
 	 * dumping them to the checkpointing stream.
 	 */
 
-	 for(i = 0; ok &&  i <  YAFFS_NOBJECT_BUCKETS; i++){
-	 	list_for_each(lh, &dev->objectBucket[i].list) {
+	for (i = 0; ok &&  i <  YAFFS_NOBJECT_BUCKETS; i++) {
+		ylist_for_each(lh, &dev->objectBucket[i].list) {
 			if (lh) {
-				obj = list_entry(lh, yaffs_Object, hashLink);
+				obj = ylist_entry(lh, yaffs_Object, hashLink);
 				if (!obj->deferedFree) {
-					yaffs_ObjectToCheckpointObject(&cp,obj);
+					yaffs_ObjectToCheckpointObject(&cp, obj);
 					cp.structType = sizeof(cp);
 
-					T(YAFFS_TRACE_CHECKPOINT,(
+					T(YAFFS_TRACE_CHECKPOINT, (
 						TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
-						cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj));
+						cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
 
-					ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
+					ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
 
-					if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){
+					if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
 						ok = yaffs_WriteCheckpointTnodes(obj);
-					}
 				}
 			}
 		}
-	 }
+	}
 
-	 /* Dump end of list */
-	memset(&cp,0xFF,sizeof(yaffs_CheckpointObject));
+	/* Dump end of list */
+	memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
 	cp.structType = sizeof(cp);
 
-	if(ok)
-		ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
+	if (ok)
+		ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
 
 	return ok ? 1 : 0;
 }
@@ -4362,38 +4429,39 @@ static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
 	int done = 0;
 	yaffs_Object *hardList = NULL;
 
-	while(ok && !done) {
-		ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
-		if(cp.structType != sizeof(cp)) {
-			T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR),
-				cp.structType,sizeof(cp),ok));
+	while (ok && !done) {
+		ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+		if (cp.structType != sizeof(cp)) {
+			T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
+				cp.structType, sizeof(cp), ok));
 			ok = 0;
 		}
 
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
-			cp.objectId,cp.parentId,cp.variantType,cp.chunkId));
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
+			cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
 
-		if(ok && cp.objectId == ~0)
+		if (ok && cp.objectId == ~0)
 			done = 1;
-		else if(ok){
-			obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType);
-			if(obj) {
-				yaffs_CheckpointObjectToObject(obj,&cp);
-				if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+		else if (ok) {
+			obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
+			if (obj) {
+				ok = yaffs_CheckpointObjectToObject(obj, &cp);
+				if (!ok)
+					break;
+				if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
 					ok = yaffs_ReadCheckpointTnodes(obj);
-				} else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+				} else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
 					obj->hardLinks.next =
-						    (struct list_head *)
-						    hardList;
+						(struct ylist_head *) hardList;
 					hardList = obj;
 				}
-
-			}
+			} else
+				ok = 0;
 		}
 	}
 
-	if(ok)
-		yaffs_HardlinkFixup(dev,hardList);
+	if (ok)
+		yaffs_HardlinkFixup(dev, hardList);
 
 	return ok ? 1 : 0;
 }
@@ -4403,11 +4471,11 @@ static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
 	__u32 checkpointSum;
 	int ok;
 
-	yaffs_GetCheckpointSum(dev,&checkpointSum);
+	yaffs_GetCheckpointSum(dev, &checkpointSum);
 
-	ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum));
+	ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
 
-	if(!ok)
+	if (!ok)
 		return 0;
 
 	return 1;
@@ -4419,14 +4487,14 @@ static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
 	__u32 checkpointSum1;
 	int ok;
 
-	yaffs_GetCheckpointSum(dev,&checkpointSum0);
+	yaffs_GetCheckpointSum(dev, &checkpointSum0);
 
-	ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+	ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
 
-	if(!ok)
+	if (!ok)
 		return 0;
 
-	if(checkpointSum0 != checkpointSum1)
+	if (checkpointSum0 != checkpointSum1)
 		return 0;
 
 	return 1;
@@ -4435,46 +4503,43 @@ static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
 
 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
 {
-
 	int ok = 1;
 
-	if(dev->skipCheckpointWrite || !dev->isYaffs2){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR)));
+	if (dev->skipCheckpointWrite || !dev->isYaffs2) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
 		ok = 0;
 	}
 
-	if(ok)
-		ok = yaffs_CheckpointOpen(dev,1);
+	if (ok)
+		ok = yaffs_CheckpointOpen(dev, 1);
 
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR)));
-		ok = yaffs_WriteCheckpointValidityMarker(dev,1);
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+		ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
 	}
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR)));
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
 		ok = yaffs_WriteCheckpointDevice(dev);
 	}
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR)));
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
 		ok = yaffs_WriteCheckpointObjects(dev);
 	}
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR)));
-		ok = yaffs_WriteCheckpointValidityMarker(dev,0);
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+		ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
 	}
 
-	if(ok){
+	if (ok)
 		ok = yaffs_WriteCheckpointSum(dev);
-	}
 
+	if (!yaffs_CheckpointClose(dev))
+		ok = 0;
 
-	if(!yaffs_CheckpointClose(dev))
-		 ok = 0;
-
-	if(ok)
-	    	dev->isCheckpointed = 1;
-	 else
-	 	dev->isCheckpointed = 0;
+	if (ok)
+		dev->isCheckpointed = 1;
+	else
+		dev->isCheckpointed = 0;
 
 	return dev->isCheckpointed;
 }
@@ -4483,43 +4548,43 @@ static int yaffs_ReadCheckpointData(yaffs_Device *dev)
 {
 	int ok = 1;
 
-	if(dev->skipCheckpointRead || !dev->isYaffs2){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR)));
+	if (dev->skipCheckpointRead || !dev->isYaffs2) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
 		ok = 0;
 	}
 
-	if(ok)
-		ok = yaffs_CheckpointOpen(dev,0); /* open for read */
+	if (ok)
+		ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
 
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR)));
-		ok = yaffs_ReadCheckpointValidityMarker(dev,1);
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+		ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
 	}
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR)));
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
 		ok = yaffs_ReadCheckpointDevice(dev);
 	}
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR)));
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
 		ok = yaffs_ReadCheckpointObjects(dev);
 	}
-	if(ok){
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR)));
-		ok = yaffs_ReadCheckpointValidityMarker(dev,0);
+	if (ok) {
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+		ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
 	}
 
-	if(ok){
+	if (ok) {
 		ok = yaffs_ReadCheckpointSum(dev);
-		T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok));
+		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
 	}
 
-	if(!yaffs_CheckpointClose(dev))
+	if (!yaffs_CheckpointClose(dev))
 		ok = 0;
 
-	if(ok)
-	    	dev->isCheckpointed = 1;
-	 else
-	 	dev->isCheckpointed = 0;
+	if (ok)
+		dev->isCheckpointed = 1;
+	else
+		dev->isCheckpointed = 0;
 
 	return ok ? 1 : 0;
 
@@ -4527,11 +4592,11 @@ static int yaffs_ReadCheckpointData(yaffs_Device *dev)
 
 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
 {
-	if(dev->isCheckpointed ||
-	   dev->blocksInCheckpoint > 0){
+	if (dev->isCheckpointed ||
+			dev->blocksInCheckpoint > 0) {
 		dev->isCheckpointed = 0;
 		yaffs_CheckpointInvalidateStream(dev);
-		if(dev->superBlock && dev->markSuperBlockDirty)
+		if (dev->superBlock && dev->markSuperBlockDirty)
 			dev->markSuperBlockDirty(dev->superBlock);
 	}
 }
@@ -4540,18 +4605,18 @@ static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
 int yaffs_CheckpointSave(yaffs_Device *dev)
 {
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
 
 	yaffs_VerifyObjects(dev);
 	yaffs_VerifyBlocks(dev);
 	yaffs_VerifyFreeChunks(dev);
 
-	if(!dev->isCheckpointed) {
+	if (!dev->isCheckpointed) {
 		yaffs_InvalidateCheckpoint(dev);
 		yaffs_WriteCheckpointData(dev);
 	}
 
-	T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+	T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
 
 	return dev->isCheckpointed;
 }
@@ -4559,17 +4624,17 @@ int yaffs_CheckpointSave(yaffs_Device *dev)
 int yaffs_CheckpointRestore(yaffs_Device *dev)
 {
 	int retval;
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
 
 	retval = yaffs_ReadCheckpointData(dev);
 
-	if(dev->isCheckpointed){
+	if (dev->isCheckpointed) {
 		yaffs_VerifyObjects(dev);
 		yaffs_VerifyBlocks(dev);
 		yaffs_VerifyFreeChunks(dev);
 	}
 
-	T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+	T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
 
 	return retval;
 }
@@ -4584,12 +4649,12 @@ int yaffs_CheckpointRestore(yaffs_Device *dev)
  * Curve-balls: the first chunk might also be the last chunk.
  */
 
-int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
-			   int nBytes)
+int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+			int nBytes)
 {
 
 	int chunk;
-	int start;
+	__u32 start;
 	int nToCopy;
 	int n = nBytes;
 	int nDone = 0;
@@ -4600,27 +4665,26 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
 	dev = in->myDev;
 
 	while (n > 0) {
-		//chunk = offset / dev->nDataBytesPerChunk + 1;
-		//start = offset % dev->nDataBytesPerChunk;
-		yaffs_AddrToChunk(dev,offset,&chunk,&start);
+		/* chunk = offset / dev->nDataBytesPerChunk + 1; */
+		/* start = offset % dev->nDataBytesPerChunk; */
+		yaffs_AddrToChunk(dev, offset, &chunk, &start);
 		chunk++;
 
 		/* OK now check for the curveball where the start and end are in
 		 * the same chunk.
 		 */
-		if ((start + n) < dev->nDataBytesPerChunk) {
+		if ((start + n) < dev->nDataBytesPerChunk)
 			nToCopy = n;
-		} else {
+		else
 			nToCopy = dev->nDataBytesPerChunk - start;
-		}
 
 		cache = yaffs_FindChunkCache(in, chunk);
 
 		/* If the chunk is already in the cache or it is less than a whole chunk
-		 * then use the cache (if there is caching)
+		 * or we're using inband tags then use the cache (if there is caching)
 		 * else bypass the cache.
 		 */
-		if (cache || nToCopy != dev->nDataBytesPerChunk) {
+		if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
 			if (dev->nShortOpCaches > 0) {
 
 				/* If we can't find the data in the cache, then load it up. */
@@ -4641,14 +4705,9 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
 
 				cache->locked = 1;
 
-#ifdef CONFIG_YAFFS_WINCE
-				yfsd_UnlockYAFFS(TRUE);
-#endif
+
 				memcpy(buffer, &cache->data[start], nToCopy);
 
-#ifdef CONFIG_YAFFS_WINCE
-				yfsd_LockYAFFS(TRUE);
-#endif
 				cache->locked = 0;
 			} else {
 				/* Read into the local buffer then copy..*/
@@ -4657,41 +4716,19 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
 				    yaffs_GetTempBuffer(dev, __LINE__);
 				yaffs_ReadChunkDataFromObject(in, chunk,
 							      localBuffer);
-#ifdef CONFIG_YAFFS_WINCE
-				yfsd_UnlockYAFFS(TRUE);
-#endif
+
 				memcpy(buffer, &localBuffer[start], nToCopy);
 
-#ifdef CONFIG_YAFFS_WINCE
-				yfsd_LockYAFFS(TRUE);
-#endif
+
 				yaffs_ReleaseTempBuffer(dev, localBuffer,
 							__LINE__);
 			}
 
 		} else {
-#ifdef CONFIG_YAFFS_WINCE
-			__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
 
-			/* Under WinCE can't do direct transfer. Need to use a local buffer.
-			 * This is because we otherwise screw up WinCE's memory mapper
-			 */
-			yaffs_ReadChunkDataFromObject(in, chunk, localBuffer);
-
-#ifdef CONFIG_YAFFS_WINCE
-			yfsd_UnlockYAFFS(TRUE);
-#endif
-			memcpy(buffer, localBuffer, dev->nDataBytesPerChunk);
-
-#ifdef CONFIG_YAFFS_WINCE
-			yfsd_LockYAFFS(TRUE);
-			yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
-#endif
-
-#else
 			/* A full chunk. Read directly into the supplied buffer. */
 			yaffs_ReadChunkDataFromObject(in, chunk, buffer);
-#endif
+
 		}
 
 		n -= nToCopy;
@@ -4704,28 +4741,37 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
 	return nDone;
 }
 
-int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
-			  int nBytes, int writeThrough)
+int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+			int nBytes, int writeThrough)
 {
 
 	int chunk;
-	int start;
+	__u32 start;
 	int nToCopy;
 	int n = nBytes;
 	int nDone = 0;
 	int nToWriteBack;
 	int startOfWrite = offset;
 	int chunkWritten = 0;
-	int nBytesRead;
+	__u32 nBytesRead;
+	__u32 chunkStart;
 
 	yaffs_Device *dev;
 
 	dev = in->myDev;
 
 	while (n > 0 && chunkWritten >= 0) {
-		//chunk = offset / dev->nDataBytesPerChunk + 1;
-		//start = offset % dev->nDataBytesPerChunk;
-		yaffs_AddrToChunk(dev,offset,&chunk,&start);
+		/* chunk = offset / dev->nDataBytesPerChunk + 1; */
+		/* start = offset % dev->nDataBytesPerChunk; */
+		yaffs_AddrToChunk(dev, offset, &chunk, &start);
+
+		if (chunk * dev->nDataBytesPerChunk + start != offset ||
+				start >= dev->nDataBytesPerChunk) {
+			T(YAFFS_TRACE_ERROR, (
+			   TSTR("AddrToChunk of offset %d gives chunk %d start %d"
+			   TENDSTR),
+			   (int)offset, chunk, start));
+		}
 		chunk++;
 
 		/* OK now check for the curveball where the start and end are in
@@ -4740,25 +4786,32 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 			 * we need to write back as much as was there before.
 			 */
 
-			nBytesRead =
-			    in->variant.fileVariant.fileSize -
-			    ((chunk - 1) * dev->nDataBytesPerChunk);
+			chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
 
-			if (nBytesRead > dev->nDataBytesPerChunk) {
+			if (chunkStart > in->variant.fileVariant.fileSize)
+				nBytesRead = 0; /* Past end of file */
+			else
+				nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
+
+			if (nBytesRead > dev->nDataBytesPerChunk)
 				nBytesRead = dev->nDataBytesPerChunk;
-			}
 
 			nToWriteBack =
 			    (nBytesRead >
 			     (start + n)) ? nBytesRead : (start + n);
 
+			if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+				YBUG();
+
 		} else {
 			nToCopy = dev->nDataBytesPerChunk - start;
 			nToWriteBack = dev->nDataBytesPerChunk;
 		}
 
-		if (nToCopy != dev->nDataBytesPerChunk) {
-			/* An incomplete start or end chunk (or maybe both start and end chunk) */
+		if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+			/* An incomplete start or end chunk (or maybe both start and end chunk),
+			 * or we're using inband tags, so we want to use the cache buffers.
+			 */
 			if (dev->nShortOpCaches > 0) {
 				yaffs_ChunkCache *cache;
 				/* If we can't find the data in the cache, then load the cache */
@@ -4775,10 +4828,9 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 					yaffs_ReadChunkDataFromObject(in, chunk,
 								      cache->
 								      data);
-				}
-				else if(cache &&
-				        !cache->dirty &&
-					!yaffs_CheckSpaceForAllocation(in->myDev)){
+				} else if (cache &&
+					!cache->dirty &&
+					!yaffs_CheckSpaceForAllocation(in->myDev)) {
 					/* Drop the cache if it was a read cache item and
 					 * no space check has been made for it.
 					 */
@@ -4788,16 +4840,12 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 				if (cache) {
 					yaffs_UseChunkCache(dev, cache, 1);
 					cache->locked = 1;
-#ifdef CONFIG_YAFFS_WINCE
-					yfsd_UnlockYAFFS(TRUE);
-#endif
+
 
 					memcpy(&cache->data[start], buffer,
 					       nToCopy);
 
-#ifdef CONFIG_YAFFS_WINCE
-					yfsd_LockYAFFS(TRUE);
-#endif
+
 					cache->locked = 0;
 					cache->nBytes = nToWriteBack;
 
@@ -4825,15 +4873,10 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 				yaffs_ReadChunkDataFromObject(in, chunk,
 							      localBuffer);
 
-#ifdef CONFIG_YAFFS_WINCE
-				yfsd_UnlockYAFFS(TRUE);
-#endif
+
 
 				memcpy(&localBuffer[start], buffer, nToCopy);
 
-#ifdef CONFIG_YAFFS_WINCE
-				yfsd_LockYAFFS(TRUE);
-#endif
 				chunkWritten =
 				    yaffs_WriteChunkDataToObject(in, chunk,
 								 localBuffer,
@@ -4846,31 +4889,15 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 			}
 
 		} else {
-
-#ifdef CONFIG_YAFFS_WINCE
-			/* Under WinCE can't do direct transfer. Need to use a local buffer.
-			 * This is because we otherwise screw up WinCE's memory mapper
-			 */
-			__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
-#ifdef CONFIG_YAFFS_WINCE
-			yfsd_UnlockYAFFS(TRUE);
-#endif
-			memcpy(localBuffer, buffer, dev->nDataBytesPerChunk);
-#ifdef CONFIG_YAFFS_WINCE
-			yfsd_LockYAFFS(TRUE);
-#endif
-			chunkWritten =
-			    yaffs_WriteChunkDataToObject(in, chunk, localBuffer,
-							 dev->nDataBytesPerChunk,
-							 0);
-			yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
-#else
 			/* A full chunk. Write directly from the supplied buffer. */
+
+
+
 			chunkWritten =
 			    yaffs_WriteChunkDataToObject(in, chunk, buffer,
 							 dev->nDataBytesPerChunk,
 							 0);
-#endif
+
 			/* Since we've overwritten the cached data, we better invalidate it. */
 			yaffs_InvalidateChunkCache(in, chunk);
 		}
@@ -4886,9 +4913,8 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 
 	/* Update file object */
 
-	if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) {
+	if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
 		in->variant.fileVariant.fileSize = (startOfWrite + nDone);
-	}
 
 	in->dirty = 1;
 
@@ -4898,7 +4924,7 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
 
 /* ---------------------- File resizing stuff ------------------ */
 
-static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize)
+static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
 {
 
 	yaffs_Device *dev = in->myDev;
@@ -4939,11 +4965,11 @@ static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize)
 
 }
 
-int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize)
+int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
 {
 
 	int oldFileSize = in->variant.fileVariant.fileSize;
-	int newSizeOfPartialChunk;
+	__u32 newSizeOfPartialChunk;
 	int newFullChunks;
 
 	yaffs_Device *dev = in->myDev;
@@ -4955,13 +4981,11 @@ int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize)
 
 	yaffs_CheckGarbageCollection(dev);
 
-	if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
-		return yaffs_GetFileSize(in);
-	}
+	if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+		return YAFFS_FAIL;
 
-	if (newSize == oldFileSize) {
-		return oldFileSize;
-	}
+	if (newSize == oldFileSize)
+		return YAFFS_OK;
 
 	if (newSize < oldFileSize) {
 
@@ -4994,21 +5018,20 @@ int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize)
 	}
 
 
-
 	/* Write a new object header.
 	 * show we've shrunk the file, if need be
 	 * Do this only if the file is not in the deleted directories.
 	 */
-	if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
-	    in->parent->objectId != YAFFS_OBJECTID_DELETED) {
+	if (in->parent &&
+	    in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+	    in->parent->objectId != YAFFS_OBJECTID_DELETED)
 		yaffs_UpdateObjectHeader(in, NULL, 0,
 					 (newSize < oldFileSize) ? 1 : 0, 0);
-	}
 
-	return newSize;
+	return YAFFS_OK;
 }
 
-loff_t yaffs_GetFileSize(yaffs_Object * obj)
+loff_t yaffs_GetFileSize(yaffs_Object *obj)
 {
 	obj = yaffs_GetEquivalentObject(obj);
 
@@ -5024,7 +5047,7 @@ loff_t yaffs_GetFileSize(yaffs_Object * obj)
 
 
 
-int yaffs_FlushFile(yaffs_Object * in, int updateTime)
+int yaffs_FlushFile(yaffs_Object *in, int updateTime)
 {
 	int retVal;
 	if (in->dirty) {
@@ -5039,9 +5062,8 @@ int yaffs_FlushFile(yaffs_Object * in, int updateTime)
 #endif
 		}
 
-		retVal =
-		    (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
-		     0) ? YAFFS_OK : YAFFS_FAIL;
+		retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
+			0) ? YAFFS_OK : YAFFS_FAIL;
 	} else {
 		retVal = YAFFS_OK;
 	}
@@ -5050,7 +5072,7 @@ int yaffs_FlushFile(yaffs_Object * in, int updateTime)
 
 }
 
-static int yaffs_DoGenericObjectDeletion(yaffs_Object * in)
+static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
 {
 
 	/* First off, invalidate the file's data in the cache, without flushing. */
@@ -5058,13 +5080,13 @@ static int yaffs_DoGenericObjectDeletion(yaffs_Object * in)
 
 	if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
 		/* Move to the unlinked directory so we have a record that it was deleted. */
-		yaffs_ChangeObjectName(in, in->myDev->deletedDir,"deleted", 0, 0);
+		yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
 
 	}
 
 	yaffs_RemoveObjectFromDirectory(in);
-	yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__);
-	in->chunkId = -1;
+	yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+	in->hdrChunk = 0;
 
 	yaffs_FreeObject(in);
 	return YAFFS_OK;
@@ -5075,62 +5097,63 @@ static int yaffs_DoGenericObjectDeletion(yaffs_Object * in)
  * and the inode associated with the file.
  * It does not delete the links associated with the file.
  */
-static int yaffs_UnlinkFile(yaffs_Object * in)
+static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
 {
 
 	int retVal;
 	int immediateDeletion = 0;
 
-	if (1) {
 #ifdef __KERNEL__
-		if (!in->myInode) {
-			immediateDeletion = 1;
-
-		}
+	if (!in->myInode)
+		immediateDeletion = 1;
 #else
-		if (in->inUse <= 0) {
-			immediateDeletion = 1;
-
-		}
+	if (in->inUse <= 0)
+		immediateDeletion = 1;
 #endif
-		if (immediateDeletion) {
-			retVal =
-			    yaffs_ChangeObjectName(in, in->myDev->deletedDir,
-						   "deleted", 0, 0);
-			T(YAFFS_TRACE_TRACING,
-			  (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
-			   in->objectId));
-			in->deleted = 1;
-			in->myDev->nDeletedFiles++;
-			if (0 && in->myDev->isYaffs2) {
-				yaffs_ResizeFile(in, 0);
-			}
-			yaffs_SoftDeleteFile(in);
-		} else {
-			retVal =
-			    yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
-						   "unlinked", 0, 0);
-		}
 
+	if (immediateDeletion) {
+		retVal =
+		    yaffs_ChangeObjectName(in, in->myDev->deletedDir,
+					   _Y("deleted"), 0, 0);
+		T(YAFFS_TRACE_TRACING,
+		  (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+		   in->objectId));
+		in->deleted = 1;
+		in->myDev->nDeletedFiles++;
+		if (1 || in->myDev->isYaffs2)
+			yaffs_ResizeFile(in, 0);
+		yaffs_SoftDeleteFile(in);
+	} else {
+		retVal =
+		    yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+					   _Y("unlinked"), 0, 0);
 	}
+
+
 	return retVal;
 }
 
-int yaffs_DeleteFile(yaffs_Object * in)
+int yaffs_DeleteFile(yaffs_Object *in)
 {
 	int retVal = YAFFS_OK;
+	int deleted = in->deleted;
+
+	yaffs_ResizeFile(in, 0);
 
 	if (in->nDataChunks > 0) {
-		/* Use soft deletion if there is data in the file */
-		if (!in->unlinked) {
-			retVal = yaffs_UnlinkFile(in);
-		}
+		/* Use soft deletion if there is data in the file.
+		 * That won't be the case if it has been resized to zero.
+		 */
+		if (!in->unlinked)
+			retVal = yaffs_UnlinkFileIfNeeded(in);
+
 		if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
 			in->deleted = 1;
+			deleted = 1;
 			in->myDev->nDeletedFiles++;
 			yaffs_SoftDeleteFile(in);
 		}
-		return in->deleted ? YAFFS_OK : YAFFS_FAIL;
+		return deleted ? YAFFS_OK : YAFFS_FAIL;
 	} else {
 		/* The file has no data chunks so we toss it immediately */
 		yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
@@ -5141,62 +5164,75 @@ int yaffs_DeleteFile(yaffs_Object * in)
 	}
 }
 
-static int yaffs_DeleteDirectory(yaffs_Object * in)
+static int yaffs_DeleteDirectory(yaffs_Object *in)
 {
 	/* First check that the directory is empty. */
-	if (list_empty(&in->variant.directoryVariant.children)) {
+	if (ylist_empty(&in->variant.directoryVariant.children))
 		return yaffs_DoGenericObjectDeletion(in);
-	}
 
 	return YAFFS_FAIL;
 
 }
 
-static int yaffs_DeleteSymLink(yaffs_Object * in)
+static int yaffs_DeleteSymLink(yaffs_Object *in)
 {
 	YFREE(in->variant.symLinkVariant.alias);
 
 	return yaffs_DoGenericObjectDeletion(in);
 }
 
-static int yaffs_DeleteHardLink(yaffs_Object * in)
+static int yaffs_DeleteHardLink(yaffs_Object *in)
 {
 	/* remove this hardlink from the list assocaited with the equivalent
 	 * object
 	 */
-	list_del(&in->hardLinks);
+	ylist_del_init(&in->hardLinks);
 	return yaffs_DoGenericObjectDeletion(in);
 }
 
-static void yaffs_DestroyObject(yaffs_Object * obj)
+int yaffs_DeleteObject(yaffs_Object *obj)
 {
+int retVal = -1;
 	switch (obj->variantType) {
 	case YAFFS_OBJECT_TYPE_FILE:
-		yaffs_DeleteFile(obj);
+		retVal = yaffs_DeleteFile(obj);
 		break;
 	case YAFFS_OBJECT_TYPE_DIRECTORY:
-		yaffs_DeleteDirectory(obj);
+		return yaffs_DeleteDirectory(obj);
 		break;
 	case YAFFS_OBJECT_TYPE_SYMLINK:
-		yaffs_DeleteSymLink(obj);
+		retVal = yaffs_DeleteSymLink(obj);
 		break;
 	case YAFFS_OBJECT_TYPE_HARDLINK:
-		yaffs_DeleteHardLink(obj);
+		retVal = yaffs_DeleteHardLink(obj);
 		break;
 	case YAFFS_OBJECT_TYPE_SPECIAL:
-		yaffs_DoGenericObjectDeletion(obj);
+		retVal = yaffs_DoGenericObjectDeletion(obj);
 		break;
 	case YAFFS_OBJECT_TYPE_UNKNOWN:
+		retVal = 0;
 		break;		/* should not happen. */
 	}
+
+	return retVal;
 }
 
-static int yaffs_UnlinkWorker(yaffs_Object * obj)
+static int yaffs_UnlinkWorker(yaffs_Object *obj)
 {
 
+	int immediateDeletion = 0;
+
+#ifdef __KERNEL__
+	if (!obj->myInode)
+		immediateDeletion = 1;
+#else
+	if (obj->inUse <= 0)
+		immediateDeletion = 1;
+#endif
+
 	if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
 		return yaffs_DeleteHardLink(obj);
-	} else if (!list_empty(&obj->hardLinks)) {
+	} else if (!ylist_empty(&obj->hardLinks)) {
 		/* Curve ball: We're unlinking an object that has a hardlink.
 		 *
 		 * This problem arises because we are not strictly following
@@ -5215,24 +5251,24 @@ static int yaffs_UnlinkWorker(yaffs_Object * obj)
 		int retVal;
 		YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
 
-		hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
+		hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
 
-		list_del_init(&hl->hardLinks);
-		list_del_init(&hl->siblings);
+		ylist_del_init(&hl->hardLinks);
+		ylist_del_init(&hl->siblings);
 
 		yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
 
 		retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
 
-		if (retVal == YAFFS_OK) {
+		if (retVal == YAFFS_OK)
 			retVal = yaffs_DoGenericObjectDeletion(hl);
-		}
+
 		return retVal;
 
-	} else {
+	} else if (immediateDeletion) {
 		switch (obj->variantType) {
 		case YAFFS_OBJECT_TYPE_FILE:
-			return yaffs_UnlinkFile(obj);
+			return yaffs_DeleteFile(obj);
 			break;
 		case YAFFS_OBJECT_TYPE_DIRECTORY:
 			return yaffs_DeleteDirectory(obj);
@@ -5248,21 +5284,22 @@ static int yaffs_UnlinkWorker(yaffs_Object * obj)
 		default:
 			return YAFFS_FAIL;
 		}
-	}
+	} else
+		return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+					   _Y("unlinked"), 0, 0);
 }
 
 
-static int yaffs_UnlinkObject( yaffs_Object *obj)
+static int yaffs_UnlinkObject(yaffs_Object *obj)
 {
 
-	if (obj && obj->unlinkAllowed) {
+	if (obj && obj->unlinkAllowed)
 		return yaffs_UnlinkWorker(obj);
-	}
 
 	return YAFFS_FAIL;
 
 }
-int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name)
+int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
 {
 	yaffs_Object *obj;
 
@@ -5272,8 +5309,8 @@ int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name)
 
 /*----------------------- Initialisation Scanning ---------------------- */
 
-static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId,
-				       int backwardScanning)
+static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+				int backwardScanning)
 {
 	yaffs_Object *obj;
 
@@ -5286,9 +5323,8 @@ static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId,
 		/* Handle YAFFS2 case (backward scanning)
 		 * If the shadowed object exists then ignore.
 		 */
-		if (yaffs_FindObjectByNumber(dev, objId)) {
+		if (yaffs_FindObjectByNumber(dev, objId))
 			return;
-		}
 	}
 
 	/* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
@@ -5297,6 +5333,8 @@ static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId,
 	obj =
 	    yaffs_FindOrCreateObjectByNumber(dev, objId,
 					     YAFFS_OBJECT_TYPE_FILE);
+	if (!obj)
+		return;
 	yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
 	obj->variant.fileVariant.shrinkSize = 0;
 	obj->valid = 1;		/* So that we don't read any other info for this file */
@@ -5325,44 +5363,77 @@ static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
 		if (in) {
 			/* Add the hardlink pointers */
 			hl->variant.hardLinkVariant.equivalentObject = in;
-			list_add(&hl->hardLinks, &in->hardLinks);
+			ylist_add(&hl->hardLinks, &in->hardLinks);
 		} else {
 			/* Todo Need to report/handle this better.
 			 * Got a problem... hardlink to a non-existant object
 			 */
 			hl->variant.hardLinkVariant.equivalentObject = NULL;
-			INIT_LIST_HEAD(&hl->hardLinks);
+			YINIT_LIST_HEAD(&hl->hardLinks);
 
 		}
-
 	}
+}
+
+
 
+
+
+static int ybicmp(const void *a, const void *b)
+{
+	register int aseq = ((yaffs_BlockIndex *)a)->seq;
+	register int bseq = ((yaffs_BlockIndex *)b)->seq;
+	register int ablock = ((yaffs_BlockIndex *)a)->block;
+	register int bblock = ((yaffs_BlockIndex *)b)->block;
+	if (aseq == bseq)
+		return ablock - bblock;
+	else
+		return aseq - bseq;
 }
 
 
+struct yaffs_ShadowFixerStruct {
+	int objectId;
+	int shadowedId;
+	struct yaffs_ShadowFixerStruct *next;
+};
+
 
+static void yaffs_StripDeletedObjects(yaffs_Device *dev)
+{
+	/*
+	*  Sort out state of unlinked and deleted objects after scanning.
+	*/
+	struct ylist_head *i;
+	struct ylist_head *n;
+	yaffs_Object *l;
 
+	/* Soft delete all the unlinked files */
+	ylist_for_each_safe(i, n,
+		&dev->unlinkedDir->variant.directoryVariant.children) {
+		if (i) {
+			l = ylist_entry(i, yaffs_Object, siblings);
+			yaffs_DeleteObject(l);
+		}
+	}
 
-static int ybicmp(const void *a, const void *b){
-    register int aseq = ((yaffs_BlockIndex *)a)->seq;
-    register int bseq = ((yaffs_BlockIndex *)b)->seq;
-    register int ablock = ((yaffs_BlockIndex *)a)->block;
-    register int bblock = ((yaffs_BlockIndex *)b)->block;
-    if( aseq == bseq )
-        return ablock - bblock;
-    else
-        return aseq - bseq;
+	ylist_for_each_safe(i, n,
+		&dev->deletedDir->variant.directoryVariant.children) {
+		if (i) {
+			l = ylist_entry(i, yaffs_Object, siblings);
+			yaffs_DeleteObject(l);
+		}
+	}
 
 }
 
-static int yaffs_Scan(yaffs_Device * dev)
+static int yaffs_Scan(yaffs_Device *dev)
 {
 	yaffs_ExtendedTags tags;
 	int blk;
 	int blockIterator;
 	int startIterator;
 	int endIterator;
-	int nBlocksToScan = 0;
 	int result;
 
 	int chunk;
@@ -5371,26 +5442,19 @@ static int yaffs_Scan(yaffs_Device * dev)
 	yaffs_BlockState state;
 	yaffs_Object *hardList = NULL;
 	yaffs_BlockInfo *bi;
-	int sequenceNumber;
+	__u32 sequenceNumber;
 	yaffs_ObjectHeader *oh;
 	yaffs_Object *in;
 	yaffs_Object *parent;
-	int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
 
 	int alloc_failed = 0;
 
+	struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
 
-	__u8 *chunkData;
 
-	yaffs_BlockIndex *blockIndex = NULL;
+	__u8 *chunkData;
 
-	if (dev->isYaffs2) {
-		T(YAFFS_TRACE_SCAN,
-		  (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR)));
-		return YAFFS_FAIL;
-	}
 
-	//TODO  Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format.
 
 	T(YAFFS_TRACE_SCAN,
 	  (TSTR("yaffs_Scan starts  intstartblk %d intendblk %d..." TENDSTR),
@@ -5400,12 +5464,6 @@ static int yaffs_Scan(yaffs_Device * dev)
 
 	dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
 
-	if (dev->isYaffs2) {
-		blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
-		if(!blockIndex)
-			return YAFFS_FAIL;
-	}
-
 	/* Scan all the blocks to determine their state */
 	for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
 		bi = yaffs_GetBlockInfo(dev, blk);
@@ -5418,6 +5476,9 @@ static int yaffs_Scan(yaffs_Device * dev)
 		bi->blockState = state;
 		bi->sequenceNumber = sequenceNumber;
 
+		if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+			bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+
 		T(YAFFS_TRACE_SCAN_DEBUG,
 		  (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
 		   state, sequenceNumber));
@@ -5430,70 +5491,21 @@ static int yaffs_Scan(yaffs_Device * dev)
 			  (TSTR("Block empty " TENDSTR)));
 			dev->nErasedBlocks++;
 			dev->nFreeChunks += dev->nChunksPerBlock;
-		} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
-
-			/* Determine the highest sequence number */
-			if (dev->isYaffs2 &&
-			    sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
-			    sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-
-				blockIndex[nBlocksToScan].seq = sequenceNumber;
-				blockIndex[nBlocksToScan].block = blk;
-
-				nBlocksToScan++;
-
-				if (sequenceNumber >= dev->sequenceNumber) {
-					dev->sequenceNumber = sequenceNumber;
-				}
-			} else if (dev->isYaffs2) {
-				/* TODO: Nasty sequence number! */
-				T(YAFFS_TRACE_SCAN,
-				  (TSTR
-				   ("Block scanning block %d has bad sequence number %d"
-				    TENDSTR), blk, sequenceNumber));
-
-			}
 		}
 	}
 
-	/* Sort the blocks
-	 * Dungy old bubble sort for now...
-	 */
-	if (dev->isYaffs2) {
-		yaffs_BlockIndex temp;
-		int i;
-		int j;
-
-		for (i = 0; i < nBlocksToScan; i++)
-			for (j = i + 1; j < nBlocksToScan; j++)
-				if (blockIndex[i].seq > blockIndex[j].seq) {
-					temp = blockIndex[j];
-					blockIndex[j] = blockIndex[i];
-					blockIndex[i] = temp;
-				}
-	}
-
-	/* Now scan the blocks looking at the data. */
-	if (dev->isYaffs2) {
-		startIterator = 0;
-		endIterator = nBlocksToScan - 1;
-		T(YAFFS_TRACE_SCAN_DEBUG,
-		  (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
-	} else {
-		startIterator = dev->internalStartBlock;
-		endIterator = dev->internalEndBlock;
-	}
+	startIterator = dev->internalStartBlock;
+	endIterator = dev->internalEndBlock;
 
 	/* For each block.... */
 	for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
 	     blockIterator++) {
 
-		if (dev->isYaffs2) {
-			/* get the block to scan in the correct order */
-			blk = blockIndex[blockIterator].block;
-		} else {
-			blk = blockIterator;
-		}
+		YYIELD();
+
+		YYIELD();
+
+		blk = blockIterator;
 
 		bi = yaffs_GetBlockInfo(dev, blk);
 		state = bi->blockState;
@@ -5511,7 +5523,7 @@ static int yaffs_Scan(yaffs_Device * dev)
 
 			/* Let's have a good look at this chunk... */
 
-			if (!dev->isYaffs2 && tags.chunkDeleted) {
+			if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
 				/* YAFFS1 only...
 				 * A deleted chunk
 				 */
@@ -5540,18 +5552,6 @@ static int yaffs_Scan(yaffs_Device * dev)
 					dev->allocationBlockFinder = blk;
 					/* Set it to here to encourage the allocator to go forth from here. */
 
-					/* Yaffs2 sanity check:
-					 * This should be the one with the highest sequence number
-					 */
-					if (dev->isYaffs2
-					    && (dev->sequenceNumber !=
-						bi->sequenceNumber)) {
-						T(YAFFS_TRACE_ALWAYS,
-						  (TSTR
-						   ("yaffs: Allocation block %d was not highest sequence id:"
-						    " block seq = %d, dev seq = %d"
-						    TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber));
-					}
 				}
 
 				dev->nFreeChunks += (dev->nChunksPerBlock - c);
@@ -5570,11 +5570,11 @@ static int yaffs_Scan(yaffs_Device * dev)
 				 * the same chunkId).
 				 */
 
-				if(!in)
+				if (!in)
 					alloc_failed = 1;
 
-				if(in){
-					if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1))
+				if (in) {
+					if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
 						alloc_failed = 1;
 				}
 
@@ -5617,7 +5617,7 @@ static int yaffs_Scan(yaffs_Device * dev)
 					 * deleted, and worse still it has changed type. Delete the old object.
 					 */
 
-					yaffs_DestroyObject(in);
+					yaffs_DeleteObject(in);
 
 					in = 0;
 				}
@@ -5627,14 +5627,20 @@ static int yaffs_Scan(yaffs_Device * dev)
 								      objectId,
 								      oh->type);
 
-				if(!in)
+				if (!in)
 					alloc_failed = 1;
 
 				if (in && oh->shadowsObject > 0) {
-					yaffs_HandleShadowedObject(dev,
-								   oh->
-								   shadowsObject,
-								   0);
+
+					struct yaffs_ShadowFixerStruct *fixer;
+					fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
+					if (fixer) {
+						fixer->next = shadowFixerList;
+						shadowFixerList = fixer;
+						fixer->objectId = tags.objectId;
+						fixer->shadowedId = oh->shadowsObject;
+					}
+
 				}
 
 				if (in && in->valid) {
@@ -5643,12 +5649,10 @@ static int yaffs_Scan(yaffs_Device * dev)
 					unsigned existingSerial = in->serial;
 					unsigned newSerial = tags.serialNumber;
 
-					if (dev->isYaffs2 ||
-					    ((existingSerial + 1) & 3) ==
-					    newSerial) {
+					if (((existingSerial + 1) & 3) == newSerial) {
 						/* Use new one - destroy the exisiting one */
 						yaffs_DeleteChunk(dev,
-								  in->chunkId,
+								  in->hdrChunk,
 								  1, __LINE__);
 						in->valid = 0;
 					} else {
@@ -5681,7 +5685,8 @@ static int yaffs_Scan(yaffs_Device * dev)
 					in->yst_ctime = oh->yst_ctime;
 					in->yst_rdev = oh->yst_rdev;
 #endif
-					in->chunkId = chunk;
+					in->hdrChunk = chunk;
+					in->serial = tags.serialNumber;
 
 				} else if (in && !in->valid) {
 					/* we need to load this info */
@@ -5705,7 +5710,8 @@ static int yaffs_Scan(yaffs_Device * dev)
 					in->yst_ctime = oh->yst_ctime;
 					in->yst_rdev = oh->yst_rdev;
 #endif
-					in->chunkId = chunk;
+					in->hdrChunk = chunk;
+					in->serial = tags.serialNumber;
 
 					yaffs_SetObjectName(in, oh->name);
 					in->dirty = 0;
@@ -5718,25 +5724,25 @@ static int yaffs_Scan(yaffs_Device * dev)
 					    yaffs_FindOrCreateObjectByNumber
 					    (dev, oh->parentObjectId,
 					     YAFFS_OBJECT_TYPE_DIRECTORY);
-					if (parent->variantType ==
+					if (!parent)
+						alloc_failed = 1;
+					if (parent && parent->variantType ==
 					    YAFFS_OBJECT_TYPE_UNKNOWN) {
 						/* Set up as a directory */
 						parent->variantType =
-						    YAFFS_OBJECT_TYPE_DIRECTORY;
-						INIT_LIST_HEAD(&parent->variant.
-							       directoryVariant.
-							       children);
-					} else if (parent->variantType !=
-						   YAFFS_OBJECT_TYPE_DIRECTORY)
-					{
+							YAFFS_OBJECT_TYPE_DIRECTORY;
+						YINIT_LIST_HEAD(&parent->variant.
+								directoryVariant.
+								children);
+					} else if (!parent || parent->variantType !=
+						   YAFFS_OBJECT_TYPE_DIRECTORY) {
 						/* Hoosterman, another problem....
 						 * We're trying to use a non-directory as a directory
 						 */
 
 						T(YAFFS_TRACE_ERROR,
 						  (TSTR
-						   ("yaffs tragedy: attempting to use non-directory as"
-						    " a directory in scan. Put in lost+found."
+						   ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
 						    TENDSTR)));
 						parent = dev->lostNFoundDir;
 					}
@@ -5760,15 +5766,6 @@ static int yaffs_Scan(yaffs_Device * dev)
 						/* Todo got a problem */
 						break;
 					case YAFFS_OBJECT_TYPE_FILE:
-						if (dev->isYaffs2
-						    && oh->isShrink) {
-							/* Prune back the shrunken chunks */
-							yaffs_PruneResizedChunks
-							    (in, oh->fileSize);
-							/* Mark the block as having a shrinkHeader */
-							bi->hasShrinkHeader = 1;
-						}
-
 						if (dev->useHeaderFileSize)
 
 							in->variant.fileVariant.
@@ -5778,11 +5775,11 @@ static int yaffs_Scan(yaffs_Device * dev)
 						break;
 					case YAFFS_OBJECT_TYPE_HARDLINK:
 						in->variant.hardLinkVariant.
-						    equivalentObjectId =
-						    oh->equivalentObjectId;
+							equivalentObjectId =
+							oh->equivalentObjectId;
 						in->hardLinks.next =
-						    (struct list_head *)
-						    hardList;
+							(struct ylist_head *)
+							hardList;
 						hardList = in;
 						break;
 					case YAFFS_OBJECT_TYPE_DIRECTORY:
@@ -5794,15 +5791,17 @@ static int yaffs_Scan(yaffs_Device * dev)
 					case YAFFS_OBJECT_TYPE_SYMLINK:
 						in->variant.symLinkVariant.alias =
 						    yaffs_CloneString(oh->alias);
-						if(!in->variant.symLinkVariant.alias)
+						if (!in->variant.symLinkVariant.alias)
 							alloc_failed = 1;
 						break;
 					}
 
+/*
 					if (parent == dev->deletedDir) {
 						yaffs_DestroyObject(in);
 						bi->hasShrinkHeader = 1;
 					}
+*/
 				}
 			}
 		}
@@ -5823,10 +5822,6 @@ static int yaffs_Scan(yaffs_Device * dev)
 
 	}
 
-	if (blockIndex) {
-		YFREE(blockIndex);
-	}
-
 
 	/* Ok, we've done all the scanning.
 	 * Fix up the hard link chains.
@@ -5834,32 +5829,36 @@ static int yaffs_Scan(yaffs_Device * dev)
 	 * hardlinks.
 	 */
 
-	yaffs_HardlinkFixup(dev,hardList);
+	yaffs_HardlinkFixup(dev, hardList);
 
-	/* Handle the unlinked files. Since they were left in an unlinked state we should
-	 * just delete them.
-	 */
+	/* Fix up any shadowed objects */
 	{
-		struct list_head *i;
-		struct list_head *n;
-
-		yaffs_Object *l;
-		/* Soft delete all the unlinked files */
-		list_for_each_safe(i, n,
-				   &dev->unlinkedDir->variant.directoryVariant.
-				   children) {
-			if (i) {
-				l = list_entry(i, yaffs_Object, siblings);
-				yaffs_DestroyObject(l);
-			}
+		struct yaffs_ShadowFixerStruct *fixer;
+		yaffs_Object *obj;
+
+		while (shadowFixerList) {
+			fixer = shadowFixerList;
+			shadowFixerList = fixer->next;
+			/* Complete the rename transaction by deleting the shadowed object
+			 * then setting the object header to unshadowed.
+			 */
+			obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
+			if (obj)
+				yaffs_DeleteObject(obj);
+
+			obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
+
+			if (obj)
+				yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
+
+			YFREE(fixer);
 		}
 	}
 
 	yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
 
-	if(alloc_failed){
+	if (alloc_failed)
 		return YAFFS_FAIL;
-	}
 
 	T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
 
@@ -5871,25 +5870,27 @@ static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
 {
 	__u8 *chunkData;
 	yaffs_ObjectHeader *oh;
-	yaffs_Device *dev = in->myDev;
+	yaffs_Device *dev;
 	yaffs_ExtendedTags tags;
 	int result;
 	int alloc_failed = 0;
 
-	if(!in)
+	if (!in)
 		return;
 
+	dev = in->myDev;
+
 #if 0
-	T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR),
+	T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
 		in->objectId,
 		in->lazyLoaded ? "not yet" : "already"));
 #endif
 
-	if(in->lazyLoaded){
+	if (in->lazyLoaded && in->hdrChunk > 0) {
 		in->lazyLoaded = 0;
 		chunkData = yaffs_GetTempBuffer(dev, __LINE__);
 
-		result = yaffs_ReadChunkWithTagsFromNAND(dev,in->chunkId,chunkData,&tags);
+		result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
 		oh = (yaffs_ObjectHeader *) chunkData;
 
 		in->yst_mode = oh->yst_mode;
@@ -5911,18 +5912,18 @@ static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
 #endif
 		yaffs_SetObjectName(in, oh->name);
 
-		if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
-			 in->variant.symLinkVariant.alias =
+		if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+			in->variant.symLinkVariant.alias =
 						    yaffs_CloneString(oh->alias);
-			if(!in->variant.symLinkVariant.alias)
+			if (!in->variant.symLinkVariant.alias)
 				alloc_failed = 1; /* Not returned to caller */
 		}
 
-		yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__);
+		yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
 	}
 }
 
-static int yaffs_ScanBackwards(yaffs_Device * dev)
+static int yaffs_ScanBackwards(yaffs_Device *dev)
 {
 	yaffs_ExtendedTags tags;
 	int blk;
@@ -5938,7 +5939,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 	yaffs_BlockState state;
 	yaffs_Object *hardList = NULL;
 	yaffs_BlockInfo *bi;
-	int sequenceNumber;
+	__u32 sequenceNumber;
 	yaffs_ObjectHeader *oh;
 	yaffs_Object *in;
 	yaffs_Object *parent;
@@ -5972,12 +5973,12 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 	blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
 
-	if(!blockIndex) {
+	if (!blockIndex) {
 		blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
 		altBlockIndex = 1;
 	}
 
-	if(!blockIndex) {
+	if (!blockIndex) {
 		T(YAFFS_TRACE_SCAN,
 		  (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
 		return YAFFS_FAIL;
@@ -5999,15 +6000,17 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 		bi->blockState = state;
 		bi->sequenceNumber = sequenceNumber;
 
-		if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
+		if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
 			bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+		if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+			bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
 
 		T(YAFFS_TRACE_SCAN_DEBUG,
 		  (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
 		   state, sequenceNumber));
 
 
-		if(state == YAFFS_BLOCK_STATE_CHECKPOINT){
+		if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
 			dev->blocksInCheckpoint++;
 
 		} else if (state == YAFFS_BLOCK_STATE_DEAD) {
@@ -6021,8 +6024,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 		} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
 
 			/* Determine the highest sequence number */
-			if (dev->isYaffs2 &&
-			    sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
+			if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
 			    sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
 
 				blockIndex[nBlocksToScan].seq = sequenceNumber;
@@ -6030,10 +6032,9 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 				nBlocksToScan++;
 
-				if (sequenceNumber >= dev->sequenceNumber) {
+				if (sequenceNumber >= dev->sequenceNumber)
 					dev->sequenceNumber = sequenceNumber;
-				}
-			} else if (dev->isYaffs2) {
+			} else {
 				/* TODO: Nasty sequence number! */
 				T(YAFFS_TRACE_SCAN,
 				  (TSTR
@@ -6053,11 +6054,13 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 	/* Sort the blocks */
 #ifndef CONFIG_YAFFS_USE_OWN_SORT
-	yaffs_qsort(blockIndex, nBlocksToScan,
-		sizeof(yaffs_BlockIndex), ybicmp);
+	{
+		/* Use qsort now. */
+		yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
+	}
 #else
 	{
-	 	/* Dungy old bubble sort... */
+		/* Dungy old bubble sort... */
 
 		yaffs_BlockIndex temp;
 		int i;
@@ -6075,7 +6078,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 	YYIELD();
 
-    	T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
+	T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
 
 	/* Now scan the blocks looking at the data. */
 	startIterator = 0;
@@ -6085,10 +6088,10 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 	/* For each block.... backwards */
 	for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
-	     blockIterator--) {
-	        /* Cooperative multitasking! This loop can run for so
+			blockIterator--) {
+		/* Cooperative multitasking! This loop can run for so
 		   long that watchdog timers expire. */
-	        YYIELD();
+		YYIELD();
 
 		/* get the block to scan in the correct order */
 		blk = blockIndex[blockIterator].block;
@@ -6127,10 +6130,8 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 				 * this is the one being allocated from
 				 */
 
-				if(foundChunksInBlock)
-				{
+				if (foundChunksInBlock) {
 					/* This is a chunk that was skipped due to failing the erased check */
-
 				} else if (c == 0) {
 					/* We're looking at the first chunk in the block so the block is unused */
 					state = YAFFS_BLOCK_STATE_EMPTY;
@@ -6138,7 +6139,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 				} else {
 					if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
 					    state == YAFFS_BLOCK_STATE_ALLOCATING) {
-					    	if(dev->sequenceNumber == bi->sequenceNumber) {
+						if (dev->sequenceNumber == bi->sequenceNumber) {
 							/* this is the block being allocated from */
 
 							T(YAFFS_TRACE_SCAN,
@@ -6150,27 +6151,31 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 							dev->allocationBlock = blk;
 							dev->allocationPage = c;
 							dev->allocationBlockFinder = blk;
-						}
-						else {
+						} else {
 							/* This is a partially written block that is not
 							 * the current allocation block. This block must have
 							 * had a write failure, so set up for retirement.
 							 */
 
-							 bi->needsRetiring = 1;
+							 /* bi->needsRetiring = 1; ??? TODO */
 							 bi->gcPrioritise = 1;
 
 							 T(YAFFS_TRACE_ALWAYS,
-							 (TSTR("Partially written block %d being set for retirement" TENDSTR),
+							 (TSTR("Partially written block %d detected" TENDSTR),
 							 blk));
 						}
-
 					}
-
 				}
 
 				dev->nFreeChunks++;
 
+			} else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
+				T(YAFFS_TRACE_SCAN,
+				  (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
+				  blk, c));
+
+				  dev->nFreeChunks++;
+
 			} else if (tags.chunkId > 0) {
 				/* chunkId > 0 so it is a data chunk... */
 				unsigned int endpos;
@@ -6187,7 +6192,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 								      tags.
 								      objectId,
 								      YAFFS_OBJECT_TYPE_FILE);
-				if(!in){
+				if (!in) {
 					/* Out of memory */
 					alloc_failed = 1;
 				}
@@ -6197,8 +6202,8 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 				    && chunkBase <
 				    in->variant.fileVariant.shrinkSize) {
 					/* This has not been invalidated by a resize */
-					if(!yaffs_PutChunkIntoFile(in, tags.chunkId,
-							       chunk, -1)){
+					if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
+							       chunk, -1)) {
 						alloc_failed = 1;
 					}
 
@@ -6221,7 +6226,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 						    scannedFileSize;
 					}
 
-				} else if(in) {
+				} else if (in) {
 					/* This chunk has been invalidated by a resize, so delete */
 					yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
 
@@ -6242,6 +6247,8 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 					in = yaffs_FindOrCreateObjectByNumber
 					    (dev, tags.objectId,
 					     tags.extraObjectType);
+					if (!in)
+						alloc_failed = 1;
 				}
 
 				if (!in ||
@@ -6251,8 +6258,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 				    tags.extraShadows ||
 				    (!in->valid &&
 				    (tags.objectId == YAFFS_OBJECTID_ROOT ||
-				     tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
-				    ) {
+				     tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
 
 					/* If we don't have  valid info then we need to read the chunk
 					 * TODO In future we can probably defer reading the chunk and
@@ -6266,8 +6272,17 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 					oh = (yaffs_ObjectHeader *) chunkData;
 
-					if (!in)
+					if (dev->inbandTags) {
+						/* Fix up the header if they got corrupted by inband tags */
+						oh->shadowsObject = oh->inbandShadowsObject;
+						oh->isShrink = oh->inbandIsShrink;
+					}
+
+					if (!in) {
 						in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
+						if (!in)
+							alloc_failed = 1;
+					}
 
 				}
 
@@ -6275,10 +6290,9 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 					/* TODO Hoosterman we have a problem! */
 					T(YAFFS_TRACE_ERROR,
 					  (TSTR
-					   ("yaffs tragedy: Could not make object for object  %d  "
-					    "at chunk %d during scan"
+					   ("yaffs tragedy: Could not make object for object  %d at chunk %d during scan"
 					    TENDSTR), tags.objectId, chunk));
-
+					continue;
 				}
 
 				if (in->valid) {
@@ -6289,10 +6303,9 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 					if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
 					     ((oh &&
-					       oh-> type == YAFFS_OBJECT_TYPE_FILE)||
+					       oh->type == YAFFS_OBJECT_TYPE_FILE) ||
 					      (tags.extraHeaderInfoAvailable  &&
-					       tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))
-					    ) {
+					       tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
 						__u32 thisSize =
 						    (oh) ? oh->fileSize : tags.
 						    extraFileLength;
@@ -6300,7 +6313,9 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 						    (oh) ? oh->
 						    parentObjectId : tags.
 						    extraParentObjectId;
-						unsigned isShrink =
+
+
+						isShrink =
 						    (oh) ? oh->isShrink : tags.
 						    extraIsShrinkHeader;
 
@@ -6323,9 +6338,8 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 							    thisSize;
 						}
 
-						if (isShrink) {
+						if (isShrink)
 							bi->hasShrinkHeader = 1;
-						}
 
 					}
 					/* Use existing - destroy this one. */
@@ -6333,6 +6347,17 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 				}
 
+				if (!in->valid && in->variantType !=
+				    (oh ? oh->type : tags.extraObjectType))
+					T(YAFFS_TRACE_ERROR, (
+						TSTR("yaffs tragedy: Bad object type, "
+					    TCONT("%d != %d, for object %d at chunk ")
+					    TCONT("%d during scan")
+						TENDSTR), oh ?
+					    oh->type : tags.extraObjectType,
+					    in->variantType, tags.objectId,
+					    chunk));
+
 				if (!in->valid &&
 				    (tags.objectId == YAFFS_OBJECTID_ROOT ||
 				     tags.objectId ==
@@ -6340,7 +6365,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 					/* We only load some info, don't fiddle with directory structure */
 					in->valid = 1;
 
-					if(oh) {
+					if (oh) {
 						in->variantType = oh->type;
 
 						in->yst_mode = oh->yst_mode;
@@ -6365,15 +6390,15 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 						in->lazyLoaded = 1;
 					}
 
-					in->chunkId = chunk;
+					in->hdrChunk = chunk;
 
 				} else if (!in->valid) {
 					/* we need to load this info */
 
 					in->valid = 1;
-					in->chunkId = chunk;
+					in->hdrChunk = chunk;
 
-					if(oh) {
+					if (oh) {
 						in->variantType = oh->type;
 
 						in->yst_mode = oh->yst_mode;
@@ -6403,20 +6428,19 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 						yaffs_SetObjectName(in, oh->name);
 						parent =
 						    yaffs_FindOrCreateObjectByNumber
-					    		(dev, oh->parentObjectId,
-					     		 YAFFS_OBJECT_TYPE_DIRECTORY);
+							(dev, oh->parentObjectId,
+							 YAFFS_OBJECT_TYPE_DIRECTORY);
 
 						 fileSize = oh->fileSize;
- 						 isShrink = oh->isShrink;
+						 isShrink = oh->isShrink;
 						 equivalentObjectId = oh->equivalentObjectId;
 
-					}
-					else {
+					} else {
 						in->variantType = tags.extraObjectType;
 						parent =
 						    yaffs_FindOrCreateObjectByNumber
-					    		(dev, tags.extraParentObjectId,
-					     		 YAFFS_OBJECT_TYPE_DIRECTORY);
+							(dev, tags.extraParentObjectId,
+							 YAFFS_OBJECT_TYPE_DIRECTORY);
 						 fileSize = tags.extraFileLength;
 						 isShrink = tags.extraIsShrinkHeader;
 						 equivalentObjectId = tags.extraEquivalentObjectId;
@@ -6425,29 +6449,30 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 					}
 					in->dirty = 0;
 
+					if (!parent)
+						alloc_failed = 1;
+
 					/* directory stuff...
 					 * hook up to parent
 					 */
 
-					if (parent->variantType ==
+					if (parent && parent->variantType ==
 					    YAFFS_OBJECT_TYPE_UNKNOWN) {
 						/* Set up as a directory */
 						parent->variantType =
-						    YAFFS_OBJECT_TYPE_DIRECTORY;
-						INIT_LIST_HEAD(&parent->variant.
-							       directoryVariant.
-							       children);
-					} else if (parent->variantType !=
-						   YAFFS_OBJECT_TYPE_DIRECTORY)
-					{
+							YAFFS_OBJECT_TYPE_DIRECTORY;
+						YINIT_LIST_HEAD(&parent->variant.
+							directoryVariant.
+							children);
+					} else if (!parent || parent->variantType !=
+						   YAFFS_OBJECT_TYPE_DIRECTORY) {
 						/* Hoosterman, another problem....
 						 * We're trying to use a non-directory as a directory
 						 */
 
 						T(YAFFS_TRACE_ERROR,
 						  (TSTR
-						   ("yaffs tragedy: attempting to use non-directory as"
-						    " a directory in scan. Put in lost+found."
+						   ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
 						    TENDSTR)));
 						parent = dev->lostNFoundDir;
 					}
@@ -6494,12 +6519,12 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 
 						break;
 					case YAFFS_OBJECT_TYPE_HARDLINK:
-						if(!itsUnlinked) {
-						  in->variant.hardLinkVariant.equivalentObjectId =
-						    equivalentObjectId;
-						  in->hardLinks.next =
-						    (struct list_head *) hardList;
-						  hardList = in;
+						if (!itsUnlinked) {
+							in->variant.hardLinkVariant.equivalentObjectId =
+								equivalentObjectId;
+							in->hardLinks.next =
+								(struct ylist_head *) hardList;
+							hardList = in;
 						}
 						break;
 					case YAFFS_OBJECT_TYPE_DIRECTORY:
@@ -6509,12 +6534,11 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 						/* Do nothing */
 						break;
 					case YAFFS_OBJECT_TYPE_SYMLINK:
-						if(oh){
-						   in->variant.symLinkVariant.alias =
-						    yaffs_CloneString(oh->
-								      alias);
-						   if(!in->variant.symLinkVariant.alias)
-						   	alloc_failed = 1;
+						if (oh) {
+							in->variant.symLinkVariant.alias =
+								yaffs_CloneString(oh->alias);
+							if (!in->variant.symLinkVariant.alias)
+								alloc_failed = 1;
 						}
 						break;
 					}
@@ -6551,75 +6575,129 @@ static int yaffs_ScanBackwards(yaffs_Device * dev)
 	 * We should now have scanned all the objects, now it's time to add these
 	 * hardlinks.
 	 */
-	yaffs_HardlinkFixup(dev,hardList);
+	yaffs_HardlinkFixup(dev, hardList);
 
 
-	/*
-	*  Sort out state of unlinked and deleted objects.
-	*/
-	{
-		struct list_head *i;
-		struct list_head *n;
-
-		yaffs_Object *l;
-
-		/* Soft delete all the unlinked files */
-		list_for_each_safe(i, n,
-				   &dev->unlinkedDir->variant.directoryVariant.
-				   children) {
-			if (i) {
-				l = list_entry(i, yaffs_Object, siblings);
-				yaffs_DestroyObject(l);
-			}
-		}
+	yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
 
-		/* Soft delete all the deletedDir files */
-		list_for_each_safe(i, n,
-				   &dev->deletedDir->variant.directoryVariant.
-				   children) {
-			if (i) {
-				l = list_entry(i, yaffs_Object, siblings);
-				yaffs_DestroyObject(l);
+	if (alloc_failed)
+		return YAFFS_FAIL;
 
-			}
+	T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+
+	return YAFFS_OK;
+}
+
+/*------------------------------  Directory Functions ----------------------------- */
+
+static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+{
+	struct ylist_head *lh;
+	yaffs_Object *listObj;
+
+	int count = 0;
+
+	if (!obj) {
+		T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
+		YBUG();
+		return;
+	}
+
+	if (yaffs_SkipVerification(obj->myDev))
+		return;
+
+	if (!obj->parent) {
+		T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
+		YBUG();
+		return;
+	}
+
+	if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+		T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
+		YBUG();
+	}
+
+	/* Iterate through the objects in each hash entry */
+
+	ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+		if (lh) {
+			listObj = ylist_entry(lh, yaffs_Object, siblings);
+			yaffs_VerifyObject(listObj);
+			if (obj == listObj)
+				count++;
 		}
+	 }
+
+	if (count != 1) {
+		T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
+		YBUG();
 	}
+}
 
-	yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+static void yaffs_VerifyDirectory(yaffs_Object *directory)
+{
+	struct ylist_head *lh;
+	yaffs_Object *listObj;
 
-	if(alloc_failed){
-		return YAFFS_FAIL;
+	if (!directory) {
+		YBUG();
+		return;
 	}
 
-	T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+	if (yaffs_SkipFullVerification(directory->myDev))
+		return;
 
-	return YAFFS_OK;
+	if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+		T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
+		YBUG();
+	}
+
+	/* Iterate through the objects in each hash entry */
+
+	ylist_for_each(lh, &directory->variant.directoryVariant.children) {
+		if (lh) {
+			listObj = ylist_entry(lh, yaffs_Object, siblings);
+			if (listObj->parent != directory) {
+				T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
+				YBUG();
+			}
+			yaffs_VerifyObjectInDirectory(listObj);
+		}
+	}
 }
 
-/*------------------------------  Directory Functions ----------------------------- */
 
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
 {
 	yaffs_Device *dev = obj->myDev;
+	yaffs_Object *parent;
+
+	yaffs_VerifyObjectInDirectory(obj);
+	parent = obj->parent;
 
-	if(dev && dev->removeObjectCallback)
+	yaffs_VerifyDirectory(parent);
+
+	if (dev && dev->removeObjectCallback)
 		dev->removeObjectCallback(obj);
 
-	list_del_init(&obj->siblings);
+
+	ylist_del_init(&obj->siblings);
 	obj->parent = NULL;
+
+	yaffs_VerifyDirectory(parent);
 }
 
 
-static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
-				       yaffs_Object * obj)
+static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+					yaffs_Object *obj)
 {
-
 	if (!directory) {
 		T(YAFFS_TRACE_ALWAYS,
 		  (TSTR
 		   ("tragedy: Trying to add an object to a null pointer directory"
 		    TENDSTR)));
 		YBUG();
+		return;
 	}
 	if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
 		T(YAFFS_TRACE_ALWAYS,
@@ -6631,37 +6709,42 @@ static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
 
 	if (obj->siblings.prev == NULL) {
 		/* Not initialised */
-		INIT_LIST_HEAD(&obj->siblings);
-
-	} else if (!list_empty(&obj->siblings)) {
-		/* If it is holed up somewhere else, un hook it */
-		yaffs_RemoveObjectFromDirectory(obj);
+		YBUG();
 	}
+
+
+	yaffs_VerifyDirectory(directory);
+
+	yaffs_RemoveObjectFromDirectory(obj);
+
+
 	/* Now add it */
-	list_add(&obj->siblings, &directory->variant.directoryVariant.children);
+	ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
 	obj->parent = directory;
 
 	if (directory == obj->myDev->unlinkedDir
-	    || directory == obj->myDev->deletedDir) {
+			|| directory == obj->myDev->deletedDir) {
 		obj->unlinked = 1;
 		obj->myDev->nUnlinkedFiles++;
 		obj->renameAllowed = 0;
 	}
+
+	yaffs_VerifyDirectory(directory);
+	yaffs_VerifyObjectInDirectory(obj);
 }
 
-yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
-				     const YCHAR * name)
+yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
+				     const YCHAR *name)
 {
 	int sum;
 
-	struct list_head *i;
+	struct ylist_head *i;
 	YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
 
 	yaffs_Object *l;
 
-	if (!name) {
+	if (!name)
 		return NULL;
-	}
 
 	if (!directory) {
 		T(YAFFS_TRACE_ALWAYS,
@@ -6669,6 +6752,7 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
 		   ("tragedy: yaffs_FindObjectByName: null pointer directory"
 		    TENDSTR)));
 		YBUG();
+		return NULL;
 	}
 	if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
 		T(YAFFS_TRACE_ALWAYS,
@@ -6679,28 +6763,27 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
 
 	sum = yaffs_CalcNameSum(name);
 
-	list_for_each(i, &directory->variant.directoryVariant.children) {
+	ylist_for_each(i, &directory->variant.directoryVariant.children) {
 		if (i) {
-			l = list_entry(i, yaffs_Object, siblings);
+			l = ylist_entry(i, yaffs_Object, siblings);
+
+			if (l->parent != directory)
+				YBUG();
 
 			yaffs_CheckObjectDetailsLoaded(l);
 
 			/* Special case for lost-n-found */
 			if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
-				if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) {
+				if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
 					return l;
-				}
-			} else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0)
-			{
-				/* LostnFound cunk called Objxxx
+			} else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
+				/* LostnFound chunk called Objxxx
 				 * Do a real check
 				 */
 				yaffs_GetObjectName(l, buffer,
 						    YAFFS_MAX_NAME_LENGTH);
-				if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) {
+				if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
 					return l;
-				}
-
 			}
 		}
 	}
@@ -6710,10 +6793,10 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
 
 
 #if 0
-int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
-				   int (*fn) (yaffs_Object *))
+int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
+					int (*fn) (yaffs_Object *))
 {
-	struct list_head *i;
+	struct ylist_head *i;
 	yaffs_Object *l;
 
 	if (!theDir) {
@@ -6722,20 +6805,21 @@ int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
 		   ("tragedy: yaffs_FindObjectByName: null pointer directory"
 		    TENDSTR)));
 		YBUG();
+		return YAFFS_FAIL;
 	}
 	if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
 		T(YAFFS_TRACE_ALWAYS,
 		  (TSTR
 		   ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
 		YBUG();
+		return YAFFS_FAIL;
 	}
 
-	list_for_each(i, &theDir->variant.directoryVariant.children) {
+	ylist_for_each(i, &theDir->variant.directoryVariant.children) {
 		if (i) {
-			l = list_entry(i, yaffs_Object, siblings);
-			if (l && !fn(l)) {
+			l = ylist_entry(i, yaffs_Object, siblings);
+			if (l && !fn(l))
 				return YAFFS_FAIL;
-			}
 		}
 	}
 
@@ -6748,7 +6832,7 @@ int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
  * actual object.
  */
 
-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj)
+yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
 {
 	if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
 		/* We want the object id of the equivalent object, not this one */
@@ -6756,10 +6840,9 @@ yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj)
 		yaffs_CheckObjectDetailsLoaded(obj);
 	}
 	return obj;
-
 }
 
-int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
+int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
 {
 	memset(name, 0, buffSize * sizeof(YCHAR));
 
@@ -6767,18 +6850,26 @@ int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
 
 	if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
 		yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
-	} else if (obj->chunkId <= 0) {
+	} else if (obj->hdrChunk <= 0) {
 		YCHAR locName[20];
+		YCHAR numString[20];
+		YCHAR *x = &numString[19];
+		unsigned v = obj->objectId;
+		numString[19] = 0;
+		while (v > 0) {
+			x--;
+			*x = '0' + (v % 10);
+			v /= 10;
+		}
 		/* make up a name */
-		yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX,
-			      obj->objectId);
+		yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
+		yaffs_strcat(locName, x);
 		yaffs_strncpy(name, locName, buffSize - 1);
 
 	}
 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
-	else if (obj->shortName[0]) {
+	else if (obj->shortName[0])
 		yaffs_strcpy(name, obj->shortName);
-	}
 #endif
 	else {
 		int result;
@@ -6788,9 +6879,9 @@ int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
 
 		memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
 
-		if (obj->chunkId >= 0) {
+		if (obj->hdrChunk > 0) {
 			result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
-							obj->chunkId, buffer,
+							obj->hdrChunk, buffer,
 							NULL);
 		}
 		yaffs_strncpy(name, oh->name, buffSize - 1);
@@ -6801,46 +6892,43 @@ int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
 	return yaffs_strlen(name);
 }
 
-int yaffs_GetObjectFileLength(yaffs_Object * obj)
+int yaffs_GetObjectFileLength(yaffs_Object *obj)
 {
-
 	/* Dereference any hard linking */
 	obj = yaffs_GetEquivalentObject(obj);
 
-	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
 		return obj->variant.fileVariant.fileSize;
-	}
-	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
 		return yaffs_strlen(obj->variant.symLinkVariant.alias);
-	} else {
+	else {
 		/* Only a directory should drop through to here */
 		return obj->myDev->nDataBytesPerChunk;
 	}
 }
 
-int yaffs_GetObjectLinkCount(yaffs_Object * obj)
+int yaffs_GetObjectLinkCount(yaffs_Object *obj)
 {
 	int count = 0;
-	struct list_head *i;
+	struct ylist_head *i;
 
-	if (!obj->unlinked) {
-		count++;	/* the object itself */
-	}
-	list_for_each(i, &obj->hardLinks) {
-		count++;	/* add the hard links; */
-	}
-	return count;
+	if (!obj->unlinked)
+		count++;		/* the object itself */
+
+	ylist_for_each(i, &obj->hardLinks)
+		count++;		/* add the hard links; */
 
+	return count;
 }
 
-int yaffs_GetObjectInode(yaffs_Object * obj)
+int yaffs_GetObjectInode(yaffs_Object *obj)
 {
 	obj = yaffs_GetEquivalentObject(obj);
 
 	return obj->objectId;
 }
 
-unsigned yaffs_GetObjectType(yaffs_Object * obj)
+unsigned yaffs_GetObjectType(yaffs_Object *obj)
 {
 	obj = yaffs_GetEquivalentObject(obj);
 
@@ -6872,19 +6960,18 @@ unsigned yaffs_GetObjectType(yaffs_Object * obj)
 	}
 }
 
-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj)
+YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
 {
 	obj = yaffs_GetEquivalentObject(obj);
-	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
 		return yaffs_CloneString(obj->variant.symLinkVariant.alias);
-	} else {
+	else
 		return yaffs_CloneString(_Y(""));
-	}
 }
 
 #ifndef CONFIG_YAFFS_WINCE
 
-int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr)
+int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
 {
 	unsigned int valid = attr->ia_valid;
 
@@ -6910,7 +6997,7 @@ int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr)
 	return YAFFS_OK;
 
 }
-int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr)
+int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
 {
 	unsigned int valid = 0;
 
@@ -6934,13 +7021,12 @@ int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr)
 	attr->ia_valid = valid;
 
 	return YAFFS_OK;
-
 }
 
 #endif
 
 #if 0
-int yaffs_DumpObject(yaffs_Object * obj)
+int yaffs_DumpObject(yaffs_Object *obj)
 {
 	YCHAR name[257];
 
@@ -6951,7 +7037,7 @@ int yaffs_DumpObject(yaffs_Object * obj)
 	   ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
 	    " chunk %d type %d size %d\n"
 	    TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
-	   obj->dirty, obj->valid, obj->serial, obj->sum, obj->chunkId,
+	   obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
 	   yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
 
 	return YAFFS_OK;
@@ -6960,7 +7046,7 @@ int yaffs_DumpObject(yaffs_Object * obj)
 
 /*---------------------------- Initialisation code -------------------------------------- */
 
-static int yaffs_CheckDevFunctions(const yaffs_Device * dev)
+static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
 {
 
 	/* Common functions, gotta have */
@@ -7011,7 +7097,7 @@ static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
 	    yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
 				      YAFFS_LOSTNFOUND_MODE | S_IFDIR);
 
-	if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){
+	if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
 		yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
 		return YAFFS_OK;
 	}
@@ -7019,7 +7105,7 @@ static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
 	return YAFFS_FAIL;
 }
 
-int yaffs_GutsInitialise(yaffs_Device * dev)
+int yaffs_GutsInitialise(yaffs_Device *dev)
 {
 	int init_failed = 0;
 	unsigned x;
@@ -7040,6 +7126,8 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 	dev->chunkOffset = 0;
 	dev->nFreeChunks = 0;
 
+	dev->gcBlock = -1;
+
 	if (dev->startBlock == 0) {
 		dev->internalStartBlock = dev->startBlock + 1;
 		dev->internalEndBlock = dev->endBlock + 1;
@@ -7049,18 +7137,18 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 
 	/* Check geometry parameters. */
 
-	if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) ||
-	    (!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) ||
+	if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
+	    (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
+	    (dev->inbandTags && !dev->isYaffs2) ||
 	     dev->nChunksPerBlock < 2 ||
 	     dev->nReservedBlocks < 2 ||
 	     dev->internalStartBlock <= 0 ||
 	     dev->internalEndBlock <= 0 ||
-	     dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)	// otherwise it is too small
-	    ) {
+	     dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) {	/* otherwise it is too small */
 		T(YAFFS_TRACE_ALWAYS,
 		  (TSTR
-		   ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s "
-		    TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : ""));
+		   ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
+		    TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
 		return YAFFS_FAIL;
 	}
 
@@ -7070,6 +7158,12 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 		return YAFFS_FAIL;
 	}
 
+	/* Sort out space for inband tags, if required */
+	if (dev->inbandTags)
+		dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+	else
+		dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
+
 	/* Got the right mix of functions? */
 	if (!yaffs_CheckDevFunctions(dev)) {
 		/* Function missing */
@@ -7097,31 +7191,18 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 
 	dev->isMounted = 1;
 
-
-
 	/* OK now calculate a few things for the device */
 
 	/*
 	 *  Calculate all the chunk size manipulation numbers:
 	 */
-	 /* Start off assuming it is a power of 2 */
-	 dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk);
-	 dev->chunkMask = (1<<dev->chunkShift) - 1;
-
-	 if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){
-	 	/* Yes it is a power of 2, disable crumbs */
-		dev->crumbMask = 0;
-		dev->crumbShift = 0;
-		dev->crumbsPerChunk = 0;
-	 } else {
-	 	/* Not a power of 2, use crumbs instead */
-		dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart));
-		dev->crumbMask = (1<<dev->crumbShift)-1;
-		dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift);
-		dev->chunkShift = 0;
-		dev->chunkMask = 0;
-	}
-
+	x = dev->nDataBytesPerChunk;
+	/* We always use dev->chunkShift and dev->chunkDiv */
+	dev->chunkShift = Shifts(x);
+	x >>= dev->chunkShift;
+	dev->chunkDiv = x;
+	/* We only use chunk mask if chunkDiv is 1 */
+	dev->chunkMask = (1<<dev->chunkShift) - 1;
 
 	/*
 	 * Calculate chunkGroupBits.
@@ -7133,16 +7214,15 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 	bits = ShiftsGE(x);
 
 	/* Set up tnode width if wide tnodes are enabled. */
-	if(!dev->wideTnodesDisabled){
+	if (!dev->wideTnodesDisabled) {
 		/* bits must be even so that we end up with 32-bit words */
-		if(bits & 1)
+		if (bits & 1)
 			bits++;
-		if(bits < 16)
+		if (bits < 16)
 			dev->tnodeWidth = 16;
 		else
 			dev->tnodeWidth = bits;
-	}
-	else
+	} else
 		dev->tnodeWidth = 16;
 
 	dev->tnodeMask = (1<<dev->tnodeWidth)-1;
@@ -7193,7 +7273,7 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 	dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
 
 	/* Initialise temporary buffers and caches. */
-	if(!yaffs_InitialiseTempBuffers(dev))
+	if (!yaffs_InitialiseTempBuffers(dev))
 		init_failed = 1;
 
 	dev->srCache = NULL;
@@ -7203,25 +7283,26 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 	if (!init_failed &&
 	    dev->nShortOpCaches > 0) {
 		int i;
-		__u8 *buf;
+		void *buf;
 		int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
 
-		if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) {
+		if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
 			dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
-		}
 
-		buf = dev->srCache =  YMALLOC(srCacheBytes);
+		dev->srCache =  YMALLOC(srCacheBytes);
+
+		buf = (__u8 *) dev->srCache;
 
-		if(dev->srCache)
-			memset(dev->srCache,0,srCacheBytes);
+		if (dev->srCache)
+			memset(dev->srCache, 0, srCacheBytes);
 
 		for (i = 0; i < dev->nShortOpCaches && buf; i++) {
 			dev->srCache[i].object = NULL;
 			dev->srCache[i].lastUse = 0;
 			dev->srCache[i].dirty = 0;
-			dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk);
+			dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
 		}
-		if(!buf)
+		if (!buf)
 			init_failed = 1;
 
 		dev->srLastUse = 0;
@@ -7229,29 +7310,30 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 
 	dev->cacheHits = 0;
 
-	if(!init_failed){
+	if (!init_failed) {
 		dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
-		if(!dev->gcCleanupList)
+		if (!dev->gcCleanupList)
 			init_failed = 1;
 	}
 
-	if (dev->isYaffs2) {
+	if (dev->isYaffs2)
 		dev->useHeaderFileSize = 1;
-	}
-	if(!init_failed && !yaffs_InitialiseBlocks(dev))
+
+	if (!init_failed && !yaffs_InitialiseBlocks(dev))
 		init_failed = 1;
 
 	yaffs_InitialiseTnodes(dev);
 	yaffs_InitialiseObjects(dev);
 
-	if(!init_failed && !yaffs_CreateInitialDirectories(dev))
+	if (!init_failed && !yaffs_CreateInitialDirectories(dev))
 		init_failed = 1;
 
 
-	if(!init_failed){
+	if (!init_failed) {
 		/* Now scan the flash. */
 		if (dev->isYaffs2) {
-			if(yaffs_CheckpointRestore(dev)) {
+			if (yaffs_CheckpointRestore(dev)) {
+				yaffs_CheckObjectDetailsLoaded(dev->rootDir);
 				T(YAFFS_TRACE_ALWAYS,
 				  (TSTR("yaffs: restored from checkpoint" TENDSTR)));
 			} else {
@@ -7273,24 +7355,25 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 				dev->nBackgroundDeletions = 0;
 				dev->oldestDirtySequence = 0;
 
-				if(!init_failed && !yaffs_InitialiseBlocks(dev))
+				if (!init_failed && !yaffs_InitialiseBlocks(dev))
 					init_failed = 1;
 
 				yaffs_InitialiseTnodes(dev);
 				yaffs_InitialiseObjects(dev);
 
-				if(!init_failed && !yaffs_CreateInitialDirectories(dev))
+				if (!init_failed && !yaffs_CreateInitialDirectories(dev))
 					init_failed = 1;
 
-				if(!init_failed && !yaffs_ScanBackwards(dev))
+				if (!init_failed && !yaffs_ScanBackwards(dev))
 					init_failed = 1;
 			}
-		}else
-			if(!yaffs_Scan(dev))
+		} else if (!yaffs_Scan(dev))
 				init_failed = 1;
+
+		yaffs_StripDeletedObjects(dev);
 	}
 
-	if(init_failed){
+	if (init_failed) {
 		/* Clean up the mess */
 		T(YAFFS_TRACE_TRACING,
 		  (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
@@ -7318,7 +7401,7 @@ int yaffs_GutsInitialise(yaffs_Device * dev)
 
 }
 
-void yaffs_Deinitialise(yaffs_Device * dev)
+void yaffs_Deinitialise(yaffs_Device *dev)
 {
 	if (dev->isMounted) {
 		int i;
@@ -7330,7 +7413,7 @@ void yaffs_Deinitialise(yaffs_Device * dev)
 		    dev->srCache) {
 
 			for (i = 0; i < dev->nShortOpCaches; i++) {
-				if(dev->srCache[i].data)
+				if (dev->srCache[i].data)
 					YFREE(dev->srCache[i].data);
 				dev->srCache[i].data = NULL;
 			}
@@ -7341,16 +7424,17 @@ void yaffs_Deinitialise(yaffs_Device * dev)
 
 		YFREE(dev->gcCleanupList);
 
-		for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+		for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
 			YFREE(dev->tempBuffer[i].buffer);
-		}
 
 		dev->isMounted = 0;
-	}
 
+		if (dev->deinitialiseNAND)
+			dev->deinitialiseNAND(dev);
+	}
 }
 
-static int yaffs_CountFreeChunks(yaffs_Device * dev)
+static int yaffs_CountFreeChunks(yaffs_Device *dev)
 {
 	int nFree;
 	int b;
@@ -7358,7 +7442,7 @@ static int yaffs_CountFreeChunks(yaffs_Device * dev)
 	yaffs_BlockInfo *blk;
 
 	for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
-	     b++) {
+			b++) {
 		blk = yaffs_GetBlockInfo(dev, b);
 
 		switch (blk->blockState) {
@@ -7373,19 +7457,19 @@ static int yaffs_CountFreeChunks(yaffs_Device * dev)
 		default:
 			break;
 		}
-
 	}
 
 	return nFree;
 }
 
-int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
+int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
 {
 	/* This is what we report to the outside world */
 
 	int nFree;
 	int nDirtyCacheChunks;
 	int blocksForCheckpoint;
+	int i;
 
 #if 1
 	nFree = dev->nFreeChunks;
@@ -7397,12 +7481,9 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
 
 	/* Now count the number of dirty chunks in the cache and subtract those */
 
-	{
-		int i;
-		for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
-			if (dev->srCache[i].dirty)
-				nDirtyCacheChunks++;
-		}
+	for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
+		if (dev->srCache[i].dirty)
+			nDirtyCacheChunks++;
 	}
 
 	nFree -= nDirtyCacheChunks;
@@ -7410,8 +7491,8 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
 	nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
 
 	/* Now we figure out how much to reserve for the checkpoint and report that... */
-	blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
-	if(blocksForCheckpoint < 0)
+	blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+	if (blocksForCheckpoint < 0)
 		blocksForCheckpoint = 0;
 
 	nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
@@ -7425,12 +7506,12 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
 
 static int yaffs_freeVerificationFailures;
 
-static void yaffs_VerifyFreeChunks(yaffs_Device * dev)
+static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
 {
 	int counted;
 	int difference;
 
-	if(yaffs_SkipVerification(dev))
+	if (yaffs_SkipVerification(dev))
 		return;
 
 	counted = yaffs_CountFreeChunks(dev);
@@ -7447,23 +7528,25 @@ static void yaffs_VerifyFreeChunks(yaffs_Device * dev)
 
 /*---------------------------------------- YAFFS test code ----------------------*/
 
-#define yaffs_CheckStruct(structure,syze, name) \
-           if(sizeof(structure) != syze) \
-	       { \
-	         T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\
-		 name,syze,sizeof(structure))); \
-	         return YAFFS_FAIL; \
-		}
+#define yaffs_CheckStruct(structure, syze, name) \
+	do { \
+		if (sizeof(structure) != syze) { \
+			T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
+				name, syze, sizeof(structure))); \
+			return YAFFS_FAIL; \
+		} \
+	} while (0)
 
 static int yaffs_CheckStructures(void)
 {
-/*      yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") */
-/*      yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") */
-/*      yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") */
+/*      yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
+/*      yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
+/*      yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
-	yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode")
+	yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
 #endif
-	    yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader")
-
-	    return YAFFS_OK;
+#ifndef CONFIG_YAFFS_WINCE
+	yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
+#endif
+	return YAFFS_OK;
 }
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_guts.h b/target/linux/generic/files/fs/yaffs2/yaffs_guts.h
index ea06c1a38..a3b110291 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_guts.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_guts.h
@@ -90,7 +90,7 @@
 
 #define YAFFS_MAX_SHORT_OP_CACHES	20
 
-#define YAFFS_N_TEMP_BUFFERS		4
+#define YAFFS_N_TEMP_BUFFERS		6
 
 /* We limit the number attempts at sucessfully saving a chunk of data.
  * Small-page devices have 32 pages per block; large-page devices have 64.
@@ -108,6 +108,9 @@
 #define YAFFS_LOWEST_SEQUENCE_NUMBER	0x00001000
 #define YAFFS_HIGHEST_SEQUENCE_NUMBER	0xEFFFFF00
 
+/* Special sequence number for bad block that failed to be marked bad */
+#define YAFFS_SEQUENCE_BAD_BLOCK	0xFFFF0000
+
 /* ChunkCache is used for short read/write operations.*/
 typedef struct {
 	struct yaffs_ObjectStruct *object;
@@ -134,11 +137,10 @@ typedef struct {
 typedef struct {
 	unsigned chunkId:20;
 	unsigned serialNumber:2;
-	unsigned byteCount:10;
+	unsigned byteCountLSB:10;
 	unsigned objectId:18;
 	unsigned ecc:12;
-	unsigned unusedStuff:2;
-
+	unsigned byteCountMSB:2;
 } yaffs_Tags;
 
 typedef union {
@@ -277,13 +279,13 @@ typedef struct {
 
 	int softDeletions:10;	/* number of soft deleted pages */
 	int pagesInUse:10;	/* number of pages in use */
-	yaffs_BlockState blockState:4;	/* One of the above block states */
+	unsigned blockState:4;	/* One of the above block states. NB use unsigned because enum is sometimes an int */
 	__u32 needsRetiring:1;	/* Data has failed on this block, need to get valid data off */
-                        	/* and retire the block. */
-	__u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */
-	__u32 gcPrioritise: 1; 	/* An ECC check or blank check has failed on this block.
+				/* and retire the block. */
+	__u32 skipErasedCheck:1; /* If this is set we can skip the erased check on this block */
+	__u32 gcPrioritise:1; 	/* An ECC check or blank check has failed on this block.
 				   It should be prioritised for GC */
-        __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
+	__u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
 
 #ifdef CONFIG_YAFFS_YAFFS2
 	__u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
@@ -300,11 +302,11 @@ typedef struct {
 
 	/* Apply to everything  */
 	int parentObjectId;
-	__u16 sum__NoLongerUsed;	/* checksum of name. No longer used */
+	__u16 sum__NoLongerUsed;        /* checksum of name. No longer used */
 	YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
 
-	/* Thes following apply to directories, files, symlinks - not hard links */
-	__u32 yst_mode;		/* protection */
+	/* The following apply to directories, files, symlinks - not hard links */
+	__u32 yst_mode;         /* protection */
 
 #ifdef CONFIG_YAFFS_WINCE
 	__u32 notForWinCE[5];
@@ -331,11 +333,14 @@ typedef struct {
 	__u32 win_ctime[2];
 	__u32 win_atime[2];
 	__u32 win_mtime[2];
-	__u32 roomToGrow[4];
 #else
-	__u32 roomToGrow[10];
+	__u32 roomToGrow[6];
+
 #endif
+	__u32 inbandShadowsObject;
+	__u32 inbandIsShrink;
 
+	__u32 reservedSpace[2];
 	int shadowsObject;	/* This object header shadows the specified object if > 0 */
 
 	/* isShrink applies to object headers written when we shrink the file (ie resize) */
@@ -381,7 +386,7 @@ typedef struct {
 } yaffs_FileStructure;
 
 typedef struct {
-	struct list_head children;	/* list of child links */
+	struct ylist_head children;     /* list of child links */
 } yaffs_DirectoryStructure;
 
 typedef struct {
@@ -418,23 +423,24 @@ struct yaffs_ObjectStruct {
 				 * still in the inode cache. Free of object is defered.
 				 * until the inode is released.
 				 */
+	__u8 beingCreated:1;	/* This object is still being created so skip some checks. */
 
 	__u8 serial;		/* serial number of chunk in NAND. Cached here */
 	__u16 sum;		/* sum of the name to speed searching */
 
-	struct yaffs_DeviceStruct *myDev;	/* The device I'm on */
+	struct yaffs_DeviceStruct *myDev;       /* The device I'm on */
 
-	struct list_head hashLink;	/* list of objects in this hash bucket */
+	struct ylist_head hashLink;     /* list of objects in this hash bucket */
 
-	struct list_head hardLinks;	/* all the equivalent hard linked objects */
+	struct ylist_head hardLinks;    /* all the equivalent hard linked objects */
 
 	/* directory structure stuff */
 	/* also used for linking up the free list */
 	struct yaffs_ObjectStruct *parent;
-	struct list_head siblings;
+	struct ylist_head siblings;
 
 	/* Where's my object header in NAND? */
-	int chunkId;
+	int hdrChunk;
 
 	int nDataChunks;	/* Number of data chunks attached to the file. */
 
@@ -485,7 +491,7 @@ struct yaffs_ObjectList_struct {
 typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
 
 typedef struct {
-	struct list_head list;
+	struct ylist_head list;
 	int count;
 } yaffs_ObjectBucket;
 
@@ -495,11 +501,10 @@ typedef struct {
  */
 
 typedef struct {
-        int structType;
+	int structType;
 	__u32 objectId;
 	__u32 parentId;
-	int chunkId;
-
+	int hdrChunk;
 	yaffs_ObjectType variantType:3;
 	__u8 deleted:1;
 	__u8 softDeleted:1;
@@ -511,8 +516,7 @@ typedef struct {
 
 	int nDataChunks;
 	__u32 fileSizeOrEquivalentObjectId;
-
-}yaffs_CheckpointObject;
+} yaffs_CheckpointObject;
 
 /*--------------------- Temporary buffers ----------------
  *
@@ -528,13 +532,13 @@ typedef struct {
 /*----------------- Device ---------------------------------*/
 
 struct yaffs_DeviceStruct {
-	struct list_head devList;
+	struct ylist_head devList;
 	const char *name;
 
 	/* Entry parameters set up way early. Yaffs sets up the rest.*/
 	int nDataBytesPerChunk;	/* Should be a power of 2 >= 512 */
 	int nChunksPerBlock;	/* does not need to be a power of 2 */
-	int nBytesPerSpare;	/* spare area size */
+	int spareBytesPerChunk;	/* spare area size */
 	int startBlock;		/* Start block we're allowed to use */
 	int endBlock;		/* End block we're allowed to use */
 	int nReservedBlocks;	/* We want this tuneable so that we can reduce */
@@ -544,9 +548,7 @@ struct yaffs_DeviceStruct {
 	/* Stuff used by the shared space checkpointing mechanism */
 	/* If this value is zero, then this mechanism is disabled */
 
-	int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */
-
-
+/*	int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */
 
 
 	int nShortOpCaches;	/* If <= 0, then short op caching is disabled, else
@@ -560,30 +562,31 @@ struct yaffs_DeviceStruct {
 	void *genericDevice;	/* Pointer to device context
 				 * On an mtd this holds the mtd pointer.
 				 */
-        void *superBlock;
+	void *superBlock;
 
 	/* NAND access functions (Must be set before calling YAFFS)*/
 
-	int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev,
-				 int chunkInNAND, const __u8 * data,
-				 const yaffs_Spare * spare);
-	int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev,
-				  int chunkInNAND, __u8 * data,
-				  yaffs_Spare * spare);
-	int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev,
-				 int blockInNAND);
-	int (*initialiseNAND) (struct yaffs_DeviceStruct * dev);
+	int (*writeChunkToNAND) (struct yaffs_DeviceStruct *dev,
+					int chunkInNAND, const __u8 *data,
+					const yaffs_Spare *spare);
+	int (*readChunkFromNAND) (struct yaffs_DeviceStruct *dev,
+					int chunkInNAND, __u8 *data,
+					yaffs_Spare *spare);
+	int (*eraseBlockInNAND) (struct yaffs_DeviceStruct *dev,
+					int blockInNAND);
+	int (*initialiseNAND) (struct yaffs_DeviceStruct *dev);
+	int (*deinitialiseNAND) (struct yaffs_DeviceStruct *dev);
 
 #ifdef CONFIG_YAFFS_YAFFS2
-	int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev,
-					 int chunkInNAND, const __u8 * data,
-					 const yaffs_ExtendedTags * tags);
-	int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev,
-					  int chunkInNAND, __u8 * data,
-					  yaffs_ExtendedTags * tags);
-	int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo);
-	int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo,
-			       yaffs_BlockState * state, int *sequenceNumber);
+	int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct *dev,
+					 int chunkInNAND, const __u8 *data,
+					 const yaffs_ExtendedTags *tags);
+	int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct *dev,
+					  int chunkInNAND, __u8 *data,
+					  yaffs_ExtendedTags *tags);
+	int (*markNANDBlockBad) (struct yaffs_DeviceStruct *dev, int blockNo);
+	int (*queryNANDBlock) (struct yaffs_DeviceStruct *dev, int blockNo,
+			       yaffs_BlockState *state, __u32 *sequenceNumber);
 #endif
 
 	int isYaffs2;
@@ -595,10 +598,12 @@ struct yaffs_DeviceStruct {
 	void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
 
 	/* Callback to mark the superblock dirsty */
-	void (*markSuperBlockDirty)(void * superblock);
+	void (*markSuperBlockDirty)(void *superblock);
 
 	int wideTnodesDisabled; /* Set to disable wide tnodes */
 
+	YCHAR *pathDividers;	/* String of legal path dividers */
+
 
 	/* End of stuff that must be set before initialisation. */
 
@@ -615,16 +620,14 @@ struct yaffs_DeviceStruct {
 	__u32 tnodeWidth;
 	__u32 tnodeMask;
 
-	/* Stuff to support various file offses to chunk/offset translations */
-	/* "Crumbs" for nDataBytesPerChunk not being a power of 2 */
-	__u32 crumbMask;
-	__u32 crumbShift;
-	__u32 crumbsPerChunk;
-
-	/* Straight shifting for nDataBytesPerChunk being a power of 2 */
-	__u32 chunkShift;
-	__u32 chunkMask;
+	/* Stuff for figuring out file offset to chunk conversions */
+	__u32 chunkShift; /* Shift value */
+	__u32 chunkDiv;   /* Divisor after shifting: 1 for power-of-2 sizes */
+	__u32 chunkMask;  /* Mask to use for power-of-2 case */
 
+	/* Stuff to handle inband tags */
+	int inbandTags;
+	__u32 totalBytesPerChunk;
 
 #ifdef __KERNEL__
 
@@ -633,7 +636,7 @@ struct yaffs_DeviceStruct {
 	__u8 *spareBuffer;	/* For mtdif2 use. Don't know the size of the buffer
 				 * at compile time so we have to allocate it.
 				 */
-	void (*putSuperFunc) (struct super_block * sb);
+	void (*putSuperFunc) (struct super_block *sb);
 #endif
 
 	int isMounted;
@@ -663,6 +666,8 @@ struct yaffs_DeviceStruct {
 	__u32 checkpointSum;
 	__u32 checkpointXor;
 
+	int nCheckpointBlocksRequired; /* Number of blocks needed to store current checkpoint set */
+
 	/* Block Info */
 	yaffs_BlockInfo *blockInfo;
 	__u8 *chunkBits;	/* bitmap of chunks in use */
@@ -684,11 +689,15 @@ struct yaffs_DeviceStruct {
 	yaffs_TnodeList *allocatedTnodeList;
 
 	int isDoingGC;
+	int gcBlock;
+	int gcChunk;
 
 	int nObjectsCreated;
 	yaffs_Object *freeObjects;
 	int nFreeObjects;
 
+	int nHardLinks;
+
 	yaffs_ObjectList *allocatedObjectList;
 
 	yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
@@ -745,8 +754,10 @@ struct yaffs_DeviceStruct {
 	int nBackgroundDeletions;	/* Count of background deletions. */
 
 
+	/* Temporary buffer management */
 	yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
 	int maxTemp;
+	int tempInUse;
 	int unmanagedTempAllocations;
 	int unmanagedTempDeallocations;
 
@@ -758,9 +769,9 @@ struct yaffs_DeviceStruct {
 
 typedef struct yaffs_DeviceStruct yaffs_Device;
 
-/* The static layout of bllock usage etc is stored in the super block header */
+/* The static layout of block usage etc is stored in the super block header */
 typedef struct {
-        int StructType;
+	int StructType;
 	int version;
 	int checkpointStartBlock;
 	int checkpointEndBlock;
@@ -773,7 +784,7 @@ typedef struct {
  * must be preserved over unmount/mount cycles.
  */
 typedef struct {
-        int structType;
+	int structType;
 	int nErasedBlocks;
 	int allocationBlock;	/* Current block being allocated off */
 	__u32 allocationPage;
@@ -791,57 +802,45 @@ typedef struct {
 
 
 typedef struct {
-    int structType;
-    __u32 magic;
-    __u32 version;
-    __u32 head;
+	int structType;
+	__u32 magic;
+	__u32 version;
+	__u32 head;
 } yaffs_CheckpointValidity;
 
-/* Function to manipulate block info */
-static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
-{
-	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
-		T(YAFFS_TRACE_ERROR,
-		  (TSTR
-		   ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
-		   blk));
-		YBUG();
-	}
-	return &dev->blockInfo[blk - dev->internalStartBlock];
-}
 
 /*----------------------- YAFFS Functions -----------------------*/
 
-int yaffs_GutsInitialise(yaffs_Device * dev);
-void yaffs_Deinitialise(yaffs_Device * dev);
+int yaffs_GutsInitialise(yaffs_Device *dev);
+void yaffs_Deinitialise(yaffs_Device *dev);
 
-int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev);
+int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev);
 
-int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
-		       yaffs_Object * newDir, const YCHAR * newName);
+int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+		       yaffs_Object *newDir, const YCHAR *newName);
 
-int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name);
-int yaffs_DeleteFile(yaffs_Object * obj);
+int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name);
+int yaffs_DeleteObject(yaffs_Object *obj);
 
-int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize);
-int yaffs_GetObjectFileLength(yaffs_Object * obj);
-int yaffs_GetObjectInode(yaffs_Object * obj);
-unsigned yaffs_GetObjectType(yaffs_Object * obj);
-int yaffs_GetObjectLinkCount(yaffs_Object * obj);
+int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize);
+int yaffs_GetObjectFileLength(yaffs_Object *obj);
+int yaffs_GetObjectInode(yaffs_Object *obj);
+unsigned yaffs_GetObjectType(yaffs_Object *obj);
+int yaffs_GetObjectLinkCount(yaffs_Object *obj);
 
-int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr);
-int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr);
+int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr);
+int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr);
 
 /* File operations */
-int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset,
-			   int nBytes);
-int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset,
-			  int nBytes, int writeThrough);
-int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize);
+int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, loff_t offset,
+				int nBytes);
+int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, loff_t offset,
+				int nBytes, int writeThrough);
+int yaffs_ResizeFile(yaffs_Object *obj, loff_t newSize);
 
-yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
-			      __u32 mode, __u32 uid, __u32 gid);
-int yaffs_FlushFile(yaffs_Object * obj, int updateTime);
+yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+				__u32 mode, __u32 uid, __u32 gid);
+int yaffs_FlushFile(yaffs_Object *obj, int updateTime);
 
 /* Flushing and checkpointing */
 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
@@ -850,33 +849,33 @@ int yaffs_CheckpointSave(yaffs_Device *dev);
 int yaffs_CheckpointRestore(yaffs_Device *dev);
 
 /* Directory operations */
-yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
-				   __u32 mode, __u32 uid, __u32 gid);
-yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name);
-int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
+yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+				__u32 mode, __u32 uid, __u32 gid);
+yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir, const YCHAR *name);
+int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
 				   int (*fn) (yaffs_Object *));
 
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number);
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number);
 
 /* Link operations */
-yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
-			 yaffs_Object * equivalentObject);
+yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+			 yaffs_Object *equivalentObject);
 
-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj);
+yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj);
 
 /* Symlink operations */
-yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
+yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
 				 __u32 mode, __u32 uid, __u32 gid,
-				 const YCHAR * alias);
-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj);
+				 const YCHAR *alias);
+YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj);
 
 /* Special inodes (fifos, sockets and devices) */
-yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
 				 __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
 
 /* Special directories */
-yaffs_Object *yaffs_Root(yaffs_Device * dev);
-yaffs_Object *yaffs_LostNFound(yaffs_Device * dev);
+yaffs_Object *yaffs_Root(yaffs_Device *dev);
+yaffs_Object *yaffs_LostNFound(yaffs_Device *dev);
 
 #ifdef CONFIG_YAFFS_WINCE
 /* CONFIG_YAFFS_WINCE special stuff */
@@ -885,18 +884,21 @@ void yfsd_WinFileTimeNow(__u32 target[2]);
 
 #ifdef __KERNEL__
 
-void yaffs_HandleDeferedFree(yaffs_Object * obj);
+void yaffs_HandleDeferedFree(yaffs_Object *obj);
 #endif
 
 /* Debug dump  */
-int yaffs_DumpObject(yaffs_Object * obj);
+int yaffs_DumpObject(yaffs_Object *obj);
 
-void yaffs_GutsTest(yaffs_Device * dev);
+void yaffs_GutsTest(yaffs_Device *dev);
 
 /* A few useful functions */
-void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
-void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn);
-int yaffs_CheckFF(__u8 * buffer, int nBytes);
+void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
+void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn);
+int yaffs_CheckFF(__u8 *buffer, int nBytes);
 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
 
+__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
+void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
+
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c
index 466e5a44c..306e18839 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c
@@ -12,7 +12,7 @@
  */
 
 const char *yaffs_mtdif_c_version =
-    "$Id: yaffs_mtdif.c,v 1.19 2007-02-14 01:09:06 wookey Exp $";
+	"$Id: yaffs_mtdif.c,v 1.22 2009-03-06 17:20:51 wookey Exp $";
 
 #include "yportenv.h"
 
@@ -24,7 +24,7 @@ const char *yaffs_mtdif_c_version =
 #include "linux/time.h"
 #include "linux/mtd/nand.h"
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
 static struct nand_oobinfo yaffs_oobinfo = {
 	.useecc = 1,
 	.eccbytes = 6,
@@ -36,7 +36,7 @@ static struct nand_oobinfo yaffs_noeccinfo = {
 };
 #endif
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
 {
 	oob[0] = spare->tagByte0;
@@ -45,8 +45,8 @@ static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
 	oob[3] = spare->tagByte3;
 	oob[4] = spare->tagByte4;
 	oob[5] = spare->tagByte5 & 0x3f;
-	oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80;
-	oob[5] |= spare->pageStatus == 0 ? 0: 0x40;
+	oob[5] |= spare->blockStatus == 'Y' ? 0 : 0x80;
+	oob[5] |= spare->pageStatus == 0 ? 0 : 0x40;
 	oob[6] = spare->tagByte6;
 	oob[7] = spare->tagByte7;
 }
@@ -71,18 +71,18 @@ static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
 }
 #endif
 
-int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
-			     const __u8 * data, const yaffs_Spare * spare)
+int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
+			     const __u8 *data, const yaffs_Spare *spare)
 {
 	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 	struct mtd_oob_ops ops;
 #endif
 	size_t dummy;
 	int retval = 0;
 
 	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 	__u8 spareAsBytes[8]; /* OOB */
 
 	if (data && !spare)
@@ -135,18 +135,18 @@ int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
 		return YAFFS_FAIL;
 }
 
-int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
-			      yaffs_Spare * spare)
+int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
+			      yaffs_Spare *spare)
 {
 	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 	struct mtd_oob_ops ops;
 #endif
 	size_t dummy;
 	int retval = 0;
 
 	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 	__u8 spareAsBytes[8]; /* OOB */
 
 	if (data && !spare)
@@ -205,7 +205,7 @@ int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
 		return YAFFS_FAIL;
 }
 
-int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
+int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
 {
 	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
 	__u32 addr =
@@ -234,7 +234,7 @@ int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
 		return YAFFS_FAIL;
 }
 
-int nandmtd_InitialiseNAND(yaffs_Device * dev)
+int nandmtd_InitialiseNAND(yaffs_Device *dev)
 {
 	return YAFFS_OK;
 }
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.h b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.h
index 317600cac..e72cfcddf 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.h
@@ -18,10 +18,15 @@
 
 #include "yaffs_guts.h"
 
-int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
-			     const __u8 * data, const yaffs_Spare * spare);
-int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
-			      yaffs_Spare * spare);
-int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber);
-int nandmtd_InitialiseNAND(yaffs_Device * dev);
+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
+extern struct nand_oobinfo yaffs_oobinfo;
+extern struct nand_oobinfo yaffs_noeccinfo;
+#endif
+
+int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
+			const __u8 *data, const yaffs_Spare *spare);
+int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
+			yaffs_Spare *spare);
+int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+int nandmtd_InitialiseNAND(yaffs_Device *dev);
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.c b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.c
index 36d5adec5..c069dfac7 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.c
@@ -26,7 +26,7 @@
 #include "yportenv.h"
 #include "yaffs_guts.h"
 #include "yaffs_packedtags1.h"
-#include "yaffs_tagscompat.h"	// for yaffs_CalcTagsECC
+#include "yaffs_tagscompat.h"	/* for yaffs_CalcTagsECC */
 
 #include "linux/kernel.h"
 #include "linux/version.h"
@@ -34,9 +34,9 @@
 #include "linux/mtd/mtd.h"
 
 /* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 
-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $";
+const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.10 2009-03-09 07:41:10 charles Exp $";
 
 #ifndef CONFIG_YAFFS_9BYTE_TAGS
 # define YTAG1_SIZE 8
@@ -89,9 +89,9 @@ static struct nand_ecclayout nand_oob_16 = {
  * Returns YAFFS_OK or YAFFS_FAIL.
  */
 int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
-	int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
+	int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags)
 {
-	struct mtd_info * mtd = dev->genericDevice;
+	struct mtd_info *mtd = dev->genericDevice;
 	int chunkBytes = dev->nDataBytesPerChunk;
 	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
 	struct mtd_oob_ops ops;
@@ -146,7 +146,7 @@ int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
 
 /* Return with empty ExtendedTags but add eccResult.
  */
-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
+static int rettags(yaffs_ExtendedTags *etags, int eccResult, int retval)
 {
 	if (etags) {
 		memset(etags, 0, sizeof(*etags));
@@ -169,9 +169,9 @@ static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
  * Returns YAFFS_OK or YAFFS_FAIL.
  */
 int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
-	int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
+	int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags)
 {
-	struct mtd_info * mtd = dev->genericDevice;
+	struct mtd_info *mtd = dev->genericDevice;
 	int chunkBytes = dev->nDataBytesPerChunk;
 	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
 	int eccres = YAFFS_ECC_RESULT_NO_ERROR;
@@ -189,7 +189,7 @@ int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
 	ops.datbuf = data;
 	ops.oobbuf = (__u8 *)&pt1;
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20))
 	/* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
 	 * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
 	 */
@@ -284,11 +284,11 @@ int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
  */
 int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
 {
-	struct mtd_info * mtd = dev->genericDevice;
+	struct mtd_info *mtd = dev->genericDevice;
 	int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
 	int retval;
 
-	yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
+	yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo);
 
 	retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
 	return (retval) ? YAFFS_FAIL : YAFFS_OK;
@@ -298,7 +298,7 @@ int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
  *
  * Returns YAFFS_OK or YAFFS_FAIL.
  */
-static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
+static int nandmtd1_TestPrerequists(struct mtd_info *mtd)
 {
 	/* 2.6.18 has mtd->ecclayout->oobavail */
 	/* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
@@ -323,10 +323,11 @@ static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
  * Always returns YAFFS_OK.
  */
 int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-	yaffs_BlockState * pState, int *pSequenceNumber)
+	yaffs_BlockState *pState, __u32 *pSequenceNumber)
 {
-	struct mtd_info * mtd = dev->genericDevice;
+	struct mtd_info *mtd = dev->genericDevice;
 	int chunkNo = blockNo * dev->nChunksPerBlock;
+	loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
 	yaffs_ExtendedTags etags;
 	int state = YAFFS_BLOCK_STATE_DEAD;
 	int seqnum = 0;
@@ -335,21 +336,22 @@ int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
 	/* We don't yet have a good place to test for MTD config prerequists.
 	 * Do it here as we are called during the initial scan.
 	 */
-	if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
+	if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK)
 		return YAFFS_FAIL;
-	}
 
 	retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
+	etags.blockBad = (mtd->block_isbad)(mtd, addr);
 	if (etags.blockBad) {
 		yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-			"block %d is marked bad", blockNo);
+			"block %d is marked bad\n", blockNo);
 		state = YAFFS_BLOCK_STATE_DEAD;
-	}
-	else if (etags.chunkUsed) {
+	} else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
+		/* bad tags, need to look more closely */
+		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+	} else if (etags.chunkUsed) {
 		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
 		seqnum = etags.sequenceNumber;
-	}
-	else {
+	} else {
 		state = YAFFS_BLOCK_STATE_EMPTY;
 	}
 
@@ -360,4 +362,4 @@ int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
 	return YAFFS_OK;
 }
 
-#endif /*KERNEL_VERSION*/
+#endif /*MTD_VERSION*/
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.h b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.h
index c4f6197d6..240202cdf 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif1.h
@@ -14,15 +14,15 @@
 #ifndef __YAFFS_MTDIF1_H__
 #define __YAFFS_MTDIF1_H__
 
-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
-	const __u8 * data, const yaffs_ExtendedTags * tags);
+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
+	const __u8 *data, const yaffs_ExtendedTags *tags);
 
-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-	__u8 * data, yaffs_ExtendedTags * tags);
+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+	__u8 *data, yaffs_ExtendedTags *tags);
 
 int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
 
 int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-	yaffs_BlockState * state, int *sequenceNumber);
+	yaffs_BlockState *state, __u32 *sequenceNumber);
 
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.c b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.c
index cdad0734b..77504babb 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.c
@@ -14,7 +14,7 @@
 /* mtd interface for YAFFS2 */
 
 const char *yaffs_mtdif2_c_version =
-    "$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
+	"$Id: yaffs_mtdif2.c,v 1.23 2009-03-06 17:20:53 wookey Exp $";
 
 #include "yportenv.h"
 
@@ -27,19 +27,23 @@ const char *yaffs_mtdif2_c_version =
 
 #include "yaffs_packedtags2.h"
 
-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
-				      const __u8 * data,
-				      const yaffs_ExtendedTags * tags)
+/* NB For use with inband tags....
+ * We assume that the data buffer is of size totalBytersPerChunk so that we can also
+ * use it to load the tags.
+ */
+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
+				      const __u8 *data,
+				      const yaffs_ExtendedTags *tags)
 {
 	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 	struct mtd_oob_ops ops;
 #else
 	size_t dummy;
 #endif
 	int retval = 0;
 
-	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
+	loff_t addr;
 
 	yaffs_PackedTags2 pt;
 
@@ -48,46 +52,40 @@ int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
 	   ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
 	    TENDSTR), chunkInNAND, data, tags));
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-	if (tags)
-		yaffs_PackTags2(&pt, tags);
-	else
-		BUG(); /* both tags and data should always be present */
 
-	if (data) {
-		ops.mode = MTD_OOB_AUTO;
-		ops.ooblen = sizeof(pt);
-		ops.len = dev->nDataBytesPerChunk;
-		ops.ooboffs = 0;
-		ops.datbuf = (__u8 *)data;
-		ops.oobbuf = (void *)&pt;
-		retval = mtd->write_oob(mtd, addr, &ops);
+	addr  = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
+
+	/* For yaffs2 writing there must be both data and tags.
+	 * If we're using inband tags, then the tags are stuffed into
+	 * the end of the data buffer.
+	 */
+	if (!data || !tags)
+		BUG();
+	else if (dev->inbandTags) {
+		yaffs_PackedTags2TagsPart *pt2tp;
+		pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
+		yaffs_PackTags2TagsPart(pt2tp, tags);
 	} else
-		BUG(); /* both tags and data should always be present */
-#else
-	if (tags) {
 		yaffs_PackTags2(&pt, tags);
-	}
 
-	if (data && tags) {
-		if (dev->useNANDECC)
-			retval =
-			    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
-					   &dummy, data, (__u8 *) & pt, NULL);
-		else
-			retval =
-			    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
-					   &dummy, data, (__u8 *) & pt, NULL);
-	} else {
-		if (data)
-			retval =
-			    mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
-				       data);
-		if (tags)
-			retval =
-			    mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
-					   (__u8 *) & pt);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+	ops.mode = MTD_OOB_AUTO;
+	ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
+	ops.len = dev->totalBytesPerChunk;
+	ops.ooboffs = 0;
+	ops.datbuf = (__u8 *)data;
+	ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
+	retval = mtd->write_oob(mtd, addr, &ops);
 
+#else
+	if (!dev->inbandTags) {
+		retval =
+		    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+				   &dummy, data, (__u8 *) &pt, NULL);
+	} else {
+		retval =
+		    mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
+			       data);
 	}
 #endif
 
@@ -97,17 +95,18 @@ int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
 		return YAFFS_FAIL;
 }
 
-int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-				       __u8 * data, yaffs_ExtendedTags * tags)
+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+				       __u8 *data, yaffs_ExtendedTags *tags)
 {
 	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
 	struct mtd_oob_ops ops;
 #endif
 	size_t dummy;
 	int retval = 0;
+	int localData = 0;
 
-	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
+	loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
 
 	yaffs_PackedTags2 pt;
 
@@ -116,9 +115,20 @@ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
 	   ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
 	    TENDSTR), chunkInNAND, data, tags));
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-	if (data && !tags)
-		retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
+	if (dev->inbandTags) {
+
+		if (!data) {
+			localData = 1;
+			data = yaffs_GetTempBuffer(dev, __LINE__);
+		}
+
+
+	}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+	if (dev->inbandTags || (data && !tags))
+		retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
 				&dummy, data);
 	else if (tags) {
 		ops.mode = MTD_OOB_AUTO;
@@ -130,38 +140,42 @@ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
 		retval = mtd->read_oob(mtd, addr, &ops);
 	}
 #else
-	if (data && tags) {
-		if (dev->useNANDECC) {
-			retval =
-			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
-					  &dummy, data, dev->spareBuffer,
-					  NULL);
-		} else {
-			retval =
-			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+	if (!dev->inbandTags && data && tags) {
+
+		retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
 					  &dummy, data, dev->spareBuffer,
 					  NULL);
-		}
 	} else {
 		if (data)
 			retval =
 			    mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
 				      data);
-		if (tags)
+		if (!dev->inbandTags && tags)
 			retval =
 			    mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
 					  dev->spareBuffer);
 	}
 #endif
 
-	memcpy(&pt, dev->spareBuffer, sizeof(pt));
 
-	if (tags)
-		yaffs_UnpackTags2(tags, &pt);
+	if (dev->inbandTags) {
+		if (tags) {
+			yaffs_PackedTags2TagsPart *pt2tp;
+			pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
+			yaffs_UnpackTags2TagsPart(tags, pt2tp);
+		}
+	} else {
+		if (tags) {
+			memcpy(&pt, dev->spareBuffer, sizeof(pt));
+			yaffs_UnpackTags2(tags, &pt);
+		}
+	}
 
-	if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
-		tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
+	if (localData)
+		yaffs_ReleaseTempBuffer(dev, data, __LINE__);
 
+	if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
+		tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
 	if (retval == 0)
 		return YAFFS_OK;
 	else
@@ -178,7 +192,7 @@ int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
 	retval =
 	    mtd->block_markbad(mtd,
 			       blockNo * dev->nChunksPerBlock *
-			       dev->nDataBytesPerChunk);
+			       dev->totalBytesPerChunk);
 
 	if (retval == 0)
 		return YAFFS_OK;
@@ -188,7 +202,7 @@ int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
 }
 
 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-			    yaffs_BlockState * state, int *sequenceNumber)
+			    yaffs_BlockState *state, __u32 *sequenceNumber)
 {
 	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
 	int retval;
@@ -198,7 +212,7 @@ int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
 	retval =
 	    mtd->block_isbad(mtd,
 			     blockNo * dev->nChunksPerBlock *
-			     dev->nDataBytesPerChunk);
+			     dev->totalBytesPerChunk);
 
 	if (retval) {
 		T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.h b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.h
index b67ba52aa..b5ff07881 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif2.h
@@ -17,13 +17,13 @@
 #define __YAFFS_MTDIF2_H__
 
 #include "yaffs_guts.h"
-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
-				      const __u8 * data,
-				      const yaffs_ExtendedTags * tags);
-int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-				       __u8 * data, yaffs_ExtendedTags * tags);
+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
+				const __u8 *data,
+				const yaffs_ExtendedTags *tags);
+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+				__u8 *data, yaffs_ExtendedTags *tags);
 int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-			    yaffs_BlockState * state, int *sequenceNumber);
+			yaffs_BlockState *state, __u32 *sequenceNumber);
 
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_nand.c b/target/linux/generic/files/fs/yaffs2/yaffs_nand.c
index 4e250338d..bd815cb7a 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_nand.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_nand.c
@@ -12,16 +12,17 @@
  */
 
 const char *yaffs_nand_c_version =
-    "$Id: yaffs_nand.c,v 1.7 2007-02-14 01:09:06 wookey Exp $";
+	"$Id: yaffs_nand.c,v 1.10 2009-03-06 17:20:54 wookey Exp $";
 
 #include "yaffs_nand.h"
 #include "yaffs_tagscompat.h"
 #include "yaffs_tagsvalidity.h"
 
+#include "yaffs_getblockinfo.h"
 
-int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-					   __u8 * buffer,
-					   yaffs_ExtendedTags * tags)
+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+					   __u8 *buffer,
+					   yaffs_ExtendedTags *tags)
 {
 	int result;
 	yaffs_ExtendedTags localTags;
@@ -29,7 +30,7 @@ int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
 	int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
 
 	/* If there are no tags provided, use local tags to get prioritised gc working */
-	if(!tags)
+	if (!tags)
 		tags = &localTags;
 
 	if (dev->readChunkWithTagsFromNAND)
@@ -40,20 +41,20 @@ int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
 									realignedChunkInNAND,
 									buffer,
 									tags);
-	if(tags &&
-	   tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
+	if (tags &&
+	   tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
 
 		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
-                yaffs_HandleChunkError(dev,bi);
+		yaffs_HandleChunkError(dev, bi);
 	}
 
 	return result;
 }
 
-int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
 						   int chunkInNAND,
-						   const __u8 * buffer,
-						   yaffs_ExtendedTags * tags)
+						   const __u8 *buffer,
+						   yaffs_ExtendedTags *tags)
 {
 	chunkInNAND -= dev->chunkOffset;
 
@@ -84,7 +85,7 @@ int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
 								       tags);
 }
 
-int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
+int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
 {
 	blockNo -= dev->blockOffset;
 
@@ -95,10 +96,10 @@ int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
 		return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
 }
 
-int yaffs_QueryInitialBlockState(yaffs_Device * dev,
+int yaffs_QueryInitialBlockState(yaffs_Device *dev,
 						 int blockNo,
-						 yaffs_BlockState * state,
-						 unsigned *sequenceNumber)
+						 yaffs_BlockState *state,
+						 __u32 *sequenceNumber)
 {
 	blockNo -= dev->blockOffset;
 
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_nand.h b/target/linux/generic/files/fs/yaffs2/yaffs_nand.h
index 5fa334bdc..e013cdc2f 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_nand.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_nand.h
@@ -19,21 +19,21 @@
 
 
 
-int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-					   __u8 * buffer,
-					   yaffs_ExtendedTags * tags);
+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+					__u8 *buffer,
+					yaffs_ExtendedTags *tags);
 
-int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
-						   int chunkInNAND,
-						   const __u8 * buffer,
-						   yaffs_ExtendedTags * tags);
+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+						int chunkInNAND,
+						const __u8 *buffer,
+						yaffs_ExtendedTags *tags);
 
-int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
+int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
 
-int yaffs_QueryInitialBlockState(yaffs_Device * dev,
-						 int blockNo,
-						 yaffs_BlockState * state,
-						 unsigned *sequenceNumber);
+int yaffs_QueryInitialBlockState(yaffs_Device *dev,
+						int blockNo,
+						yaffs_BlockState *state,
+						unsigned *sequenceNumber);
 
 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
 				  int blockInNAND);
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_nandemul2k.h b/target/linux/generic/files/fs/yaffs2/yaffs_nandemul2k.h
index cd2e96f7a..41bc2b5f8 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_nandemul2k.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_nandemul2k.h
@@ -21,14 +21,14 @@
 #include "yaffs_guts.h"
 
 int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
-					int chunkInNAND, const __u8 * data,
-					yaffs_ExtendedTags * tags);
+					int chunkInNAND, const __u8 *data,
+					const yaffs_ExtendedTags *tags);
 int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev,
-					 int chunkInNAND, __u8 * data,
-					 yaffs_ExtendedTags * tags);
+					 int chunkInNAND, __u8 *data,
+					 yaffs_ExtendedTags *tags);
 int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
 int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-			      yaffs_BlockState * state, int *sequenceNumber);
+			      yaffs_BlockState *state, __u32 *sequenceNumber);
 int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
 				int blockInNAND);
 int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev);
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.c b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.c
index f480bf1df..3e67e6916 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.c
@@ -14,7 +14,7 @@
 #include "yaffs_packedtags1.h"
 #include "yportenv.h"
 
-void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t)
+void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t)
 {
 	pt->chunkId = t->chunkId;
 	pt->serialNumber = t->serialNumber;
@@ -27,7 +27,7 @@ void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t)
 
 }
 
-void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt)
+void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt)
 {
 	static const __u8 allFF[] =
 	    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
@@ -35,9 +35,8 @@ void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt)
 
 	if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) {
 		t->blockBad = 0;
-		if (pt->shouldBeFF != 0xFFFFFFFF) {
+		if (pt->shouldBeFF != 0xFFFFFFFF)
 			t->blockBad = 1;
-		}
 		t->chunkUsed = 1;
 		t->objectId = pt->objectId;
 		t->chunkId = pt->chunkId;
@@ -47,6 +46,5 @@ void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt)
 		t->serialNumber = pt->serialNumber;
 	} else {
 		memset(t, 0, sizeof(yaffs_ExtendedTags));
-
 	}
 }
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.h b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.h
index 776c5c256..f8c0471d4 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags1.h
@@ -32,6 +32,6 @@ typedef struct {
 
 } yaffs_PackedTags1;
 
-void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t);
-void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt);
+void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t);
+void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt);
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.c b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.c
index e420f95da..a78c03c9d 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.c
@@ -37,60 +37,68 @@
 #define EXTRA_OBJECT_TYPE_SHIFT (28)
 #define EXTRA_OBJECT_TYPE_MASK  ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT)
 
-static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 * pt)
+
+static void yaffs_DumpPackedTags2TagsPart(const yaffs_PackedTags2TagsPart *ptt)
 {
 	T(YAFFS_TRACE_MTD,
 	  (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
-	   pt->t.objectId, pt->t.chunkId, pt->t.byteCount,
-	   pt->t.sequenceNumber));
+	   ptt->objectId, ptt->chunkId, ptt->byteCount,
+	   ptt->sequenceNumber));
+}
+static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt)
+{
+	yaffs_DumpPackedTags2TagsPart(&pt->t);
 }
 
-static void yaffs_DumpTags2(const yaffs_ExtendedTags * t)
+static void yaffs_DumpTags2(const yaffs_ExtendedTags *t)
 {
 	T(YAFFS_TRACE_MTD,
 	  (TSTR
-	   ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte "
-	    "%d del %d ser %d seq %d"
+	   ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d"
 	    TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId,
 	   t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber,
 	   t->sequenceNumber));
 
 }
 
-void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t)
+void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *ptt,
+		const yaffs_ExtendedTags *t)
 {
-	pt->t.chunkId = t->chunkId;
-	pt->t.sequenceNumber = t->sequenceNumber;
-	pt->t.byteCount = t->byteCount;
-	pt->t.objectId = t->objectId;
+	ptt->chunkId = t->chunkId;
+	ptt->sequenceNumber = t->sequenceNumber;
+	ptt->byteCount = t->byteCount;
+	ptt->objectId = t->objectId;
 
 	if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
 		/* Store the extra header info instead */
 		/* We save the parent object in the chunkId */
-		pt->t.chunkId = EXTRA_HEADER_INFO_FLAG
+		ptt->chunkId = EXTRA_HEADER_INFO_FLAG
 			| t->extraParentObjectId;
-		if (t->extraIsShrinkHeader) {
-			pt->t.chunkId |= EXTRA_SHRINK_FLAG;
-		}
-		if (t->extraShadows) {
-			pt->t.chunkId |= EXTRA_SHADOWS_FLAG;
-		}
+		if (t->extraIsShrinkHeader)
+			ptt->chunkId |= EXTRA_SHRINK_FLAG;
+		if (t->extraShadows)
+			ptt->chunkId |= EXTRA_SHADOWS_FLAG;
 
-		pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK;
-		pt->t.objectId |=
+		ptt->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
+		ptt->objectId |=
 		    (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
 
-		if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
-			pt->t.byteCount = t->extraEquivalentObjectId;
-		} else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) {
-			pt->t.byteCount = t->extraFileLength;
-		} else {
-			pt->t.byteCount = 0;
-		}
+		if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
+			ptt->byteCount = t->extraEquivalentObjectId;
+		else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE)
+			ptt->byteCount = t->extraFileLength;
+		else
+			ptt->byteCount = 0;
 	}
 
-	yaffs_DumpPackedTags2(pt);
+	yaffs_DumpPackedTags2TagsPart(ptt);
 	yaffs_DumpTags2(t);
+}
+
+
+void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
+{
+	yaffs_PackTags2TagsPart(&pt->t, t);
 
 #ifndef YAFFS_IGNORE_TAGS_ECC
 	{
@@ -101,82 +109,98 @@ void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t)
 #endif
 }
 
-void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt)
+
+void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t,
+		yaffs_PackedTags2TagsPart *ptt)
 {
 
 	memset(t, 0, sizeof(yaffs_ExtendedTags));
 
 	yaffs_InitialiseTags(t);
 
-	if (pt->t.sequenceNumber != 0xFFFFFFFF) {
-		/* Page is in use */
-#ifdef YAFFS_IGNORE_TAGS_ECC
-		{
-			t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
-		}
-#else
-		{
-			yaffs_ECCOther ecc;
-			int result;
-			yaffs_ECCCalculateOther((unsigned char *)&pt->t,
-						sizeof
-						(yaffs_PackedTags2TagsPart),
-						&ecc);
-			result =
-			    yaffs_ECCCorrectOther((unsigned char *)&pt->t,
-						  sizeof
-						  (yaffs_PackedTags2TagsPart),
-						  &pt->ecc, &ecc);
-			switch(result){
-				case 0:
-					t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
-					break;
-				case 1:
-					t->eccResult = YAFFS_ECC_RESULT_FIXED;
-					break;
-				case -1:
-					t->eccResult = YAFFS_ECC_RESULT_UNFIXED;
-					break;
-				default:
-					t->eccResult = YAFFS_ECC_RESULT_UNKNOWN;
-			}
-		}
-#endif
+	if (ptt->sequenceNumber != 0xFFFFFFFF) {
 		t->blockBad = 0;
 		t->chunkUsed = 1;
-		t->objectId = pt->t.objectId;
-		t->chunkId = pt->t.chunkId;
-		t->byteCount = pt->t.byteCount;
+		t->objectId = ptt->objectId;
+		t->chunkId = ptt->chunkId;
+		t->byteCount = ptt->byteCount;
 		t->chunkDeleted = 0;
 		t->serialNumber = 0;
-		t->sequenceNumber = pt->t.sequenceNumber;
+		t->sequenceNumber = ptt->sequenceNumber;
 
 		/* Do extra header info stuff */
 
-		if (pt->t.chunkId & EXTRA_HEADER_INFO_FLAG) {
+		if (ptt->chunkId & EXTRA_HEADER_INFO_FLAG) {
 			t->chunkId = 0;
 			t->byteCount = 0;
 
 			t->extraHeaderInfoAvailable = 1;
 			t->extraParentObjectId =
-			    pt->t.chunkId & (~(ALL_EXTRA_FLAGS));
+			    ptt->chunkId & (~(ALL_EXTRA_FLAGS));
 			t->extraIsShrinkHeader =
-			    (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
+			    (ptt->chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
 			t->extraShadows =
-			    (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
+			    (ptt->chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
 			t->extraObjectType =
-			    pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT;
+			    ptt->objectId >> EXTRA_OBJECT_TYPE_SHIFT;
 			t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
 
-			if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
-				t->extraEquivalentObjectId = pt->t.byteCount;
-			} else {
-				t->extraFileLength = pt->t.byteCount;
+			if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
+				t->extraEquivalentObjectId = ptt->byteCount;
+			else
+				t->extraFileLength = ptt->byteCount;
+		}
+	}
+
+	yaffs_DumpPackedTags2TagsPart(ptt);
+	yaffs_DumpTags2(t);
+
+}
+
+
+void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
+{
+
+	yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+
+	if (pt->t.sequenceNumber != 0xFFFFFFFF) {
+		/* Page is in use */
+#ifndef YAFFS_IGNORE_TAGS_ECC
+		{
+			yaffs_ECCOther ecc;
+			int result;
+			yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+						sizeof
+						(yaffs_PackedTags2TagsPart),
+						&ecc);
+			result =
+			    yaffs_ECCCorrectOther((unsigned char *)&pt->t,
+						  sizeof
+						  (yaffs_PackedTags2TagsPart),
+						  &pt->ecc, &ecc);
+			switch (result) {
+			case 0:
+				eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+				break;
+			case 1:
+				eccResult = YAFFS_ECC_RESULT_FIXED;
+				break;
+			case -1:
+				eccResult = YAFFS_ECC_RESULT_UNFIXED;
+				break;
+			default:
+				eccResult = YAFFS_ECC_RESULT_UNKNOWN;
 			}
 		}
+#endif
 	}
 
+	yaffs_UnpackTags2TagsPart(t, &pt->t);
+
+	t->eccResult = eccResult;
+
 	yaffs_DumpPackedTags2(pt);
 	yaffs_DumpTags2(t);
 
 }
+
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.h b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.h
index c2242ffe7..ec30f843b 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.h
@@ -33,6 +33,11 @@ typedef struct {
 	yaffs_ECCOther ecc;
 } yaffs_PackedTags2;
 
-void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t);
-void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt);
+/* Full packed tags with ECC, used for oob tags */
+void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
+void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
+
+/* Only the tags part (no ECC for use with inband tags */
+void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t);
+void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, yaffs_PackedTags2TagsPart *pt);
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_qsort.c b/target/linux/generic/files/fs/yaffs2/yaffs_qsort.c
index 474be9cea..187519fbd 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_qsort.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_qsort.c
@@ -28,12 +28,12 @@
  */
 
 #include "yportenv.h"
-//#include <linux/string.h>
+/* #include <linux/string.h> */
 
 /*
  * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
  */
-#define swapcode(TYPE, parmi, parmj, n) { 		\
+#define swapcode(TYPE, parmi, parmj, n) do { 		\
 	long i = (n) / sizeof (TYPE); 			\
 	register TYPE *pi = (TYPE *) (parmi); 		\
 	register TYPE *pj = (TYPE *) (parmj); 		\
@@ -41,28 +41,29 @@
 		register TYPE	t = *pi;		\
 		*pi++ = *pj;				\
 		*pj++ = t;				\
-        } while (--i > 0);				\
-}
+	} while (--i > 0);				\
+} while (0)
 
 #define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
-	es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
+	es % sizeof(long) ? 2 : es == sizeof(long) ? 0 : 1;
 
 static __inline void
 swapfunc(char *a, char *b, int n, int swaptype)
 {
 	if (swaptype <= 1)
-		swapcode(long, a, b, n)
+		swapcode(long, a, b, n);
 	else
-		swapcode(char, a, b, n)
+		swapcode(char, a, b, n);
 }
 
-#define swap(a, b)					\
+#define yswap(a, b) do {					\
 	if (swaptype == 0) {				\
 		long t = *(long *)(a);			\
 		*(long *)(a) = *(long *)(b);		\
 		*(long *)(b) = t;			\
 	} else						\
-		swapfunc(a, b, es, swaptype)
+		swapfunc(a, b, es, swaptype);		\
+} while (0)
 
 #define vecswap(a, b, n) 	if ((n) > 0) swapfunc(a, b, n, swaptype)
 
@@ -70,12 +71,12 @@ static __inline char *
 med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *))
 {
 	return cmp(a, b) < 0 ?
-	       (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
-              :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
+		(cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a))
+		: (cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c));
 }
 
 #ifndef min
-#define min(a,b) (((a) < (b)) ? (a) : (b))
+#define min(a, b) (((a) < (b)) ? (a) : (b))
 #endif
 
 void
@@ -92,7 +93,7 @@ loop:	SWAPINIT(a, es);
 		for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
 			for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
 			     pl -= es)
-				swap(pl, pl - es);
+				yswap(pl, pl - es);
 		return;
 	}
 	pm = (char *)a + (n / 2) * es;
@@ -107,7 +108,7 @@ loop:	SWAPINIT(a, es);
 		}
 		pm = med3(pl, pm, pn, cmp);
 	}
-	swap(a, pm);
+	yswap(a, pm);
 	pa = pb = (char *)a + es;
 
 	pc = pd = (char *)a + (n - 1) * es;
@@ -115,7 +116,7 @@ loop:	SWAPINIT(a, es);
 		while (pb <= pc && (r = cmp(pb, a)) <= 0) {
 			if (r == 0) {
 				swap_cnt = 1;
-				swap(pa, pb);
+				yswap(pa, pb);
 				pa += es;
 			}
 			pb += es;
@@ -123,14 +124,14 @@ loop:	SWAPINIT(a, es);
 		while (pb <= pc && (r = cmp(pc, a)) >= 0) {
 			if (r == 0) {
 				swap_cnt = 1;
-				swap(pc, pd);
+				yswap(pc, pd);
 				pd -= es;
 			}
 			pc -= es;
 		}
 		if (pb > pc)
 			break;
-		swap(pb, pc);
+		yswap(pb, pc);
 		swap_cnt = 1;
 		pb += es;
 		pc -= es;
@@ -139,7 +140,7 @@ loop:	SWAPINIT(a, es);
 		for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
 			for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
 			     pl -= es)
-				swap(pl, pl - es);
+				yswap(pl, pl - es);
 		return;
 	}
 
@@ -148,9 +149,11 @@ loop:	SWAPINIT(a, es);
 	vecswap(a, pb - r, r);
 	r = min((long)(pd - pc), (long)(pn - pd - es));
 	vecswap(pb, pn - r, r);
-	if ((r = pb - pa) > es)
+	r = pb - pa;
+	if (r > es)
 		yaffs_qsort(a, r / es, es, cmp);
-	if ((r = pd - pc) > es) {
+	r = pd - pc;
+	if (r > es) {
 		/* Iterate rather than recurse to save stack space */
 		a = pn - r;
 		n = r / es;
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_qsort.h b/target/linux/generic/files/fs/yaffs2/yaffs_qsort.h
index 610b7ec84..941c7a87c 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_qsort.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_qsort.h
@@ -17,7 +17,7 @@
 #ifndef __YAFFS_QSORT_H__
 #define __YAFFS_QSORT_H__
 
-extern void yaffs_qsort (void *const base, size_t total_elems, size_t size,
-                   int (*cmp)(const void *, const void *));
+extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
+			int (*cmp)(const void *, const void *));
 
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.c b/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.c
index 7622b1af7..402537fb4 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.c
@@ -14,16 +14,17 @@
 #include "yaffs_guts.h"
 #include "yaffs_tagscompat.h"
 #include "yaffs_ecc.h"
+#include "yaffs_getblockinfo.h"
 
-static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND);
+static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND);
 #ifdef NOTYET
-static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND);
-static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
-				     const __u8 * data,
-				     const yaffs_Spare * spare);
-static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
-				    const yaffs_Spare * spare);
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND);
+static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND);
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+				     const __u8 *data,
+				     const yaffs_Spare *spare);
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+				    const yaffs_Spare *spare);
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND);
 #endif
 
 static const char yaffs_countBitsTable[256] = {
@@ -54,13 +55,13 @@ int yaffs_CountBits(__u8 x)
 
 /********** Tags ECC calculations  *********/
 
-void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare)
+void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
 {
 	yaffs_ECCCalculate(data, spare->ecc1);
 	yaffs_ECCCalculate(&data[256], spare->ecc2);
 }
 
-void yaffs_CalcTagsECC(yaffs_Tags * tags)
+void yaffs_CalcTagsECC(yaffs_Tags *tags)
 {
 	/* Calculate an ecc */
 
@@ -74,9 +75,8 @@ void yaffs_CalcTagsECC(yaffs_Tags * tags)
 	for (i = 0; i < 8; i++) {
 		for (j = 1; j & 0xff; j <<= 1) {
 			bit++;
-			if (b[i] & j) {
+			if (b[i] & j)
 				ecc ^= bit;
-			}
 		}
 	}
 
@@ -84,7 +84,7 @@ void yaffs_CalcTagsECC(yaffs_Tags * tags)
 
 }
 
-int yaffs_CheckECCOnTags(yaffs_Tags * tags)
+int yaffs_CheckECCOnTags(yaffs_Tags *tags)
 {
 	unsigned ecc = tags->ecc;
 
@@ -115,8 +115,8 @@ int yaffs_CheckECCOnTags(yaffs_Tags * tags)
 
 /********** Tags **********/
 
-static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr,
-				    yaffs_Tags * tagsPtr)
+static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr,
+				yaffs_Tags *tagsPtr)
 {
 	yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
 
@@ -132,8 +132,8 @@ static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr,
 	sparePtr->tagByte7 = tu->asBytes[7];
 }
 
-static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
-				   yaffs_Tags * tagsPtr)
+static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,
+				yaffs_Tags *tagsPtr)
 {
 	yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
 	int result;
@@ -148,21 +148,20 @@ static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
 	tu->asBytes[7] = sparePtr->tagByte7;
 
 	result = yaffs_CheckECCOnTags(tagsPtr);
-	if (result > 0) {
+	if (result > 0)
 		dev->tagsEccFixed++;
-	} else if (result < 0) {
+	else if (result < 0)
 		dev->tagsEccUnfixed++;
-	}
 }
 
-static void yaffs_SpareInitialise(yaffs_Spare * spare)
+static void yaffs_SpareInitialise(yaffs_Spare *spare)
 {
 	memset(spare, 0xFF, sizeof(yaffs_Spare));
 }
 
 static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,
-				  int chunkInNAND, const __u8 * data,
-				  yaffs_Spare * spare)
+				int chunkInNAND, const __u8 *data,
+				yaffs_Spare *spare)
 {
 	if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
 		T(YAFFS_TRACE_ERROR,
@@ -177,9 +176,9 @@ static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,
 
 static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
 				   int chunkInNAND,
-				   __u8 * data,
-				   yaffs_Spare * spare,
-				   yaffs_ECCResult * eccResult,
+				   __u8 *data,
+				   yaffs_Spare *spare,
+				   yaffs_ECCResult *eccResult,
 				   int doErrorCorrection)
 {
 	int retVal;
@@ -252,9 +251,11 @@ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
 		/* Must allocate enough memory for spare+2*sizeof(int) */
 		/* for ecc results from device. */
 		struct yaffs_NANDSpare nspare;
-		retVal =
-		    dev->readChunkFromNAND(dev, chunkInNAND, data,
-					   (yaffs_Spare *) & nspare);
+
+		memset(&nspare, 0, sizeof(nspare));
+
+		retVal = dev->readChunkFromNAND(dev, chunkInNAND, data,
+					(yaffs_Spare *) &nspare);
 		memcpy(spare, &nspare, sizeof(yaffs_Spare));
 		if (data && doErrorCorrection) {
 			if (nspare.eccres1 > 0) {
@@ -302,8 +303,7 @@ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
 				  int chunkInNAND)
 {
-
-	static int init = 0;
+	static int init;
 	static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
 	static __u8 data[YAFFS_BYTES_PER_CHUNK];
 	/* Might as well always allocate the larger size for */
@@ -331,12 +331,12 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
  * Functions for robustisizing
  */
 
-static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND)
+static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND)
 {
 	int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
 
 	/* Mark the block for retirement */
-	yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
+	yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1;
 	T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
 	  (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND));
 
@@ -348,22 +348,22 @@ static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND)
 }
 
 #ifdef NOTYET
-static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND)
+static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND)
 {
 }
 
-static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
-				     const __u8 * data,
-				     const yaffs_Spare * spare)
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+				     const __u8 *data,
+				     const yaffs_Spare *spare)
 {
 }
 
-static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
-				    const yaffs_Spare * spare)
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+				    const yaffs_Spare *spare)
 {
 }
 
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND)
 {
 	int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
 
@@ -373,8 +373,8 @@ static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
 	yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
 }
 
-static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1,
-			       const yaffs_Spare * s0, const yaffs_Spare * s1)
+static int yaffs_VerifyCompare(const __u8 *d0, const __u8 *d1,
+			       const yaffs_Spare *s0, const yaffs_Spare *s1)
 {
 
 	if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 ||
@@ -398,28 +398,35 @@ static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1,
 }
 #endif				/* NOTYET */
 
-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
-						    int chunkInNAND,
-						    const __u8 * data,
-						    const yaffs_ExtendedTags *
-						    eTags)
+int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
+						int chunkInNAND,
+						const __u8 *data,
+						const yaffs_ExtendedTags *eTags)
 {
 	yaffs_Spare spare;
 	yaffs_Tags tags;
 
 	yaffs_SpareInitialise(&spare);
 
-	if (eTags->chunkDeleted) {
+	if (eTags->chunkDeleted)
 		spare.pageStatus = 0;
-	} else {
+	else {
 		tags.objectId = eTags->objectId;
 		tags.chunkId = eTags->chunkId;
-		tags.byteCount = eTags->byteCount;
+
+		tags.byteCountLSB = eTags->byteCount & 0x3ff;
+
+		if (dev->nDataBytesPerChunk >= 1024)
+			tags.byteCountMSB = (eTags->byteCount >> 10) & 3;
+		else
+			tags.byteCountMSB = 3;
+
+
 		tags.serialNumber = eTags->serialNumber;
 
-		if (!dev->useNANDECC && data) {
+		if (!dev->useNANDECC && data)
 			yaffs_CalcECC(data, &spare);
-		}
+
 		yaffs_LoadTagsIntoSpare(&spare, &tags);
 
 	}
@@ -427,15 +434,15 @@ int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
 	return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare);
 }
 
-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
+int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
 						     int chunkInNAND,
-						     __u8 * data,
-						     yaffs_ExtendedTags * eTags)
+						     __u8 *data,
+						     yaffs_ExtendedTags *eTags)
 {
 
 	yaffs_Spare spare;
 	yaffs_Tags tags;
-	yaffs_ECCResult eccResult;
+	yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN;
 
 	static yaffs_Spare spareFF;
 	static int init;
@@ -466,7 +473,11 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
 
 				eTags->objectId = tags.objectId;
 				eTags->chunkId = tags.chunkId;
-				eTags->byteCount = tags.byteCount;
+				eTags->byteCount = tags.byteCountLSB;
+
+				if (dev->nDataBytesPerChunk >= 1024)
+					eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10);
+
 				eTags->serialNumber = tags.serialNumber;
 			}
 		}
@@ -497,9 +508,9 @@ int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
 }
 
 int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
-					  int blockNo, yaffs_BlockState *
-					  state,
-					  int *sequenceNumber)
+					  int blockNo,
+					  yaffs_BlockState *state,
+					  __u32 *sequenceNumber)
 {
 
 	yaffs_Spare spare0, spare1;
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.h b/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.h
index a61e3ba14..6f95119e0 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_tagscompat.h
@@ -17,24 +17,23 @@
 #define __YAFFS_TAGSCOMPAT_H__
 
 #include "yaffs_guts.h"
-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
-						    int chunkInNAND,
-						    const __u8 * data,
-						    const yaffs_ExtendedTags *
-						    tags);
-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
-						     int chunkInNAND,
-						     __u8 * data,
-						     yaffs_ExtendedTags *
-						     tags);
+int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
+						int chunkInNAND,
+						const __u8 *data,
+						const yaffs_ExtendedTags *tags);
+int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
+						int chunkInNAND,
+						__u8 *data,
+						yaffs_ExtendedTags *tags);
 int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
 					    int blockNo);
 int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
-					  int blockNo, yaffs_BlockState *
-					  state, int *sequenceNumber);
+					  int blockNo,
+					  yaffs_BlockState *state,
+					  __u32 *sequenceNumber);
 
-void yaffs_CalcTagsECC(yaffs_Tags * tags);
-int yaffs_CheckECCOnTags(yaffs_Tags * tags);
+void yaffs_CalcTagsECC(yaffs_Tags *tags);
+int yaffs_CheckECCOnTags(yaffs_Tags *tags);
 int yaffs_CountBits(__u8 byte);
 
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.c b/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.c
index 9e0bd1cf5..5233bcba8 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.c
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.c
@@ -13,14 +13,14 @@
 
 #include "yaffs_tagsvalidity.h"
 
-void yaffs_InitialiseTags(yaffs_ExtendedTags * tags)
+void yaffs_InitialiseTags(yaffs_ExtendedTags *tags)
 {
 	memset(tags, 0, sizeof(yaffs_ExtendedTags));
 	tags->validMarker0 = 0xAAAAAAAA;
 	tags->validMarker1 = 0x55555555;
 }
 
-int yaffs_ValidateTags(yaffs_ExtendedTags * tags)
+int yaffs_ValidateTags(yaffs_ExtendedTags *tags)
 {
 	return (tags->validMarker0 == 0xAAAAAAAA &&
 		tags->validMarker1 == 0x55555555);
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.h b/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.h
index 2fd0c24ed..cb11884b2 100644
--- a/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.h
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_tagsvalidity.h
@@ -19,6 +19,6 @@
 
 #include "yaffs_guts.h"
 
-void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
-int yaffs_ValidateTags(yaffs_ExtendedTags * tags);
+void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
+int yaffs_ValidateTags(yaffs_ExtendedTags *tags);
 #endif
diff --git a/target/linux/generic/files/fs/yaffs2/yportenv.h b/target/linux/generic/files/fs/yaffs2/yportenv.h
index 15ac28121..28e205bbd 100644
--- a/target/linux/generic/files/fs/yaffs2/yportenv.h
+++ b/target/linux/generic/files/fs/yaffs2/yportenv.h
@@ -17,17 +17,28 @@
 #ifndef __YPORTENV_H__
 #define __YPORTENV_H__
 
+/*
+ * Define the MTD version in terms of Linux Kernel versions
+ * This allows yaffs to be used independantly of the kernel
+ * as well as with it.
+ */
+
+#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
+
 #if defined CONFIG_YAFFS_WINCE
 
 #include "ywinceenv.h"
 
-#elif  defined __KERNEL__
+#elif defined __KERNEL__
 
 #include "moduleconfig.h"
 
 /* Linux kernel */
+
 #include <linux/version.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
+#define MTD_VERSION_CODE LINUX_VERSION_CODE
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
 #include <linux/config.h>
 #endif
 #include <linux/kernel.h>
@@ -40,12 +51,13 @@
 #define YCHAR char
 #define YUCHAR unsigned char
 #define _Y(x)     x
-#define yaffs_strcpy(a,b)    strcpy(a,b)
-#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
-#define yaffs_strncmp(a,b,c) strncmp(a,b,c)
-#define yaffs_strlen(s)	     strlen(s)
-#define yaffs_sprintf	     sprintf
-#define yaffs_toupper(a)     toupper(a)
+#define yaffs_strcat(a, b)     strcat(a, b)
+#define yaffs_strcpy(a, b)     strcpy(a, b)
+#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
+#define yaffs_strncmp(a, b, c) strncmp(a, b, c)
+#define yaffs_strlen(s)	       strlen(s)
+#define yaffs_sprintf	       sprintf
+#define yaffs_toupper(a)       toupper(a)
 
 #define Y_INLINE inline
 
@@ -53,19 +65,19 @@
 #define YAFFS_LOSTNFOUND_PREFIX		"obj"
 
 /* #define YPRINTF(x) printk x */
-#define YMALLOC(x) kmalloc(x,GFP_KERNEL)
+#define YMALLOC(x) kmalloc(x, GFP_NOFS)
 #define YFREE(x)   kfree(x)
 #define YMALLOC_ALT(x) vmalloc(x)
 #define YFREE_ALT(x)   vfree(x)
 #define YMALLOC_DMA(x) YMALLOC(x)
 
-// KR - added for use in scan so processes aren't blocked indefinitely.
+/* KR - added for use in scan so processes aren't blocked indefinitely. */
 #define YYIELD() schedule()
 
 #define YAFFS_ROOT_MODE			0666
 #define YAFFS_LOSTNFOUND_MODE		0666
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
 #define Y_CURRENT_TIME CURRENT_TIME.tv_sec
 #define Y_TIME_CONVERT(x) (x).tv_sec
 #else
@@ -73,11 +85,12 @@
 #define Y_TIME_CONVERT(x) (x)
 #endif
 
-#define yaffs_SumCompare(x,y) ((x) == (y))
-#define yaffs_strcmp(a,b) strcmp(a,b)
+#define yaffs_SumCompare(x, y) ((x) == (y))
+#define yaffs_strcmp(a, b) strcmp(a, b)
 
 #define TENDSTR "\n"
 #define TSTR(x) KERN_WARNING x
+#define TCONT(x) x
 #define TOUT(p) printk p
 
 #define yaffs_trace(mask, fmt, args...) \
@@ -90,6 +103,8 @@
 
 #elif defined CONFIG_YAFFS_DIRECT
 
+#define MTD_VERSION_CODE MTD_VERSION(2, 6, 22)
+
 /* Direct interface */
 #include "ydirectenv.h"
 
@@ -111,11 +126,12 @@
 #define YCHAR char
 #define YUCHAR unsigned char
 #define _Y(x)     x
-#define yaffs_strcpy(a,b)    strcpy(a,b)
-#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
-#define yaffs_strlen(s)	     strlen(s)
-#define yaffs_sprintf	     sprintf
-#define yaffs_toupper(a)     toupper(a)
+#define yaffs_strcat(a, b)     strcat(a, b)
+#define yaffs_strcpy(a, b)     strcpy(a, b)
+#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
+#define yaffs_strlen(s)	       strlen(s)
+#define yaffs_sprintf	       sprintf
+#define yaffs_toupper(a)       toupper(a)
 
 #define Y_INLINE inline
 
@@ -133,8 +149,8 @@
 #define YAFFS_ROOT_MODE				0666
 #define YAFFS_LOSTNFOUND_MODE		0666
 
-#define yaffs_SumCompare(x,y) ((x) == (y))
-#define yaffs_strcmp(a,b) strcmp(a,b)
+#define yaffs_SumCompare(x, y) ((x) == (y))
+#define yaffs_strcmp(a, b) strcmp(a, b)
 
 #else
 /* Should have specified a configuration type */
@@ -178,10 +194,10 @@ extern unsigned int yaffs_wr_attempts;
 #define YAFFS_TRACE_ALWAYS		0xF0000000
 
 
-#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0)
+#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
 
-#ifndef CONFIG_YAFFS_WINCE
-#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__))
+#ifndef YBUG
+#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0)
 #endif
 
 #endif