From e8e50f9dedac2563718a2aecb301ab6b4b12b29d Mon Sep 17 00:00:00 2001
From: hauke <hauke@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Tue, 2 Mar 2010 21:16:18 +0000
Subject: brcm47xx: add support for kernel 2.6.33

Thanks to acoul and tripolar


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19955 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../302-kmod-fuse-dcache-bug-fuse.patch            | 82 ++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 target/linux/brcm47xx/patches-2.6.33/302-kmod-fuse-dcache-bug-fuse.patch

(limited to 'target/linux/brcm47xx/patches-2.6.33/302-kmod-fuse-dcache-bug-fuse.patch')

diff --git a/target/linux/brcm47xx/patches-2.6.33/302-kmod-fuse-dcache-bug-fuse.patch b/target/linux/brcm47xx/patches-2.6.33/302-kmod-fuse-dcache-bug-fuse.patch
new file mode 100644
index 000000000..d6c0b3ab5
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.33/302-kmod-fuse-dcache-bug-fuse.patch
@@ -0,0 +1,82 @@
+--- a/fs/fuse/dev.c
++++ b/fs/fuse/dev.c
+@@ -533,6 +533,11 @@ static void fuse_copy_finish(struct fuse
+ 	}
+ }
+ 
++#ifdef DCACHE_BUG
++extern void (*fuse_flush_cache_all)(void);
++extern void (*fuse_flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
++#endif
++
+ /*
+  * Get another pagefull of userspace buffer, and map it to kernel
+  * address space, and lock request
+@@ -541,6 +546,9 @@ static int fuse_copy_fill(struct fuse_co
+ {
+ 	unsigned long offset;
+ 	int err;
++#ifdef DCACHE_BUG
++	struct vm_area_struct *vma;
++#endif
+ 
+ 	unlock_request(cs->fc, cs->req);
+ 	fuse_copy_finish(cs);
+@@ -552,14 +560,22 @@ static int fuse_copy_fill(struct fuse_co
+ 		cs->nr_segs--;
+ 	}
+ 	down_read(&current->mm->mmap_sem);
++#ifndef DCACHE_BUG
+ 	err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
+ 			     &cs->pg, NULL);
++#else
++	err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
++			     &cs->pg, &vma);
++#endif
+ 	up_read(&current->mm->mmap_sem);
+ 	if (err < 0)
+ 		return err;
+ 	BUG_ON(err != 1);
+ 	offset = cs->addr % PAGE_SIZE;
+ 	cs->mapaddr = kmap_atomic(cs->pg, KM_USER0);
++#ifdef DCACHE_BUG
++	fuse_flush_cache_page(vma, cs->addr, page_to_pfn(cs->pg));
++#endif
+ 	cs->buf = cs->mapaddr + offset;
+ 	cs->len = min(PAGE_SIZE - offset, cs->seglen);
+ 	cs->seglen -= cs->len;
+@@ -573,6 +589,11 @@ static int fuse_copy_do(struct fuse_copy
+ {
+ 	unsigned ncpy = min(*size, cs->len);
+ 	if (val) {
++#ifdef DCACHE_BUG
++		// patch from mailing list, it is very important, otherwise,
++		// can't mount, or ls mount point will hang
++		fuse_flush_cache_all();
++#endif
+ 		if (cs->write)
+ 			memcpy(cs->buf, *val, ncpy);
+ 		else
+--- a/fs/fuse/fuse_i.h
++++ b/fs/fuse/fuse_i.h
+@@ -8,6 +8,7 @@
+ 
+ #ifndef _FS_FUSE_I_H
+ #define _FS_FUSE_I_H
++#define DCACHE_BUG
+ 
+ #include <linux/fuse.h>
+ #include <linux/fs.h>
+--- a/fs/fuse/inode.c
++++ b/fs/fuse/inode.c
+@@ -1201,6 +1201,10 @@ static int __init fuse_init(void)
+ 	printk(KERN_INFO "fuse init (API version %i.%i)\n",
+ 	       FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
+ 
++#ifdef DCACHE_BUG
++printk("fuse init: DCACHE_BUG enabled\n");
++#endif
++
+ 	INIT_LIST_HEAD(&fuse_conn_list);
+ 	res = fuse_fs_init();
+ 	if (res)
-- 
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