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--- a/kernel/dev.c
+++ b/kernel/dev.c
@@ -512,6 +512,9 @@ 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->req);
fuse_copy_finish(cs);
@@ -523,14 +526,22 @@ static int fuse_copy_fill(struct fuse_co
cs->nr_segs --;
}
down_read(¤t->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(¤t->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
+ r4k_flush_cache_page(vma, cs->addr);
+#endif
cs->buf = cs->mapaddr + offset;
cs->len = min(PAGE_SIZE - offset, cs->seglen);
cs->seglen -= cs->len;
@@ -545,6 +556,11 @@ static inline int fuse_copy_do(struct fu
{
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
+ flush_cache_all();
+#endif
if (cs->write)
memcpy(cs->buf, *val, ncpy);
else
--- a/kernel/fuse_i.h
+++ b/kernel/fuse_i.h
@@ -45,6 +45,10 @@
# endif
#endif
+//#if defined(__arm__) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
+#define DCACHE_BUG
+//#endif
+
#include "config.h"
#ifndef KERNEL_2_6
# include <linux/config.h>
--- a/kernel/inode.c
+++ b/kernel/inode.c
@@ -739,6 +739,10 @@ static int __init fuse_init(void)
printk("fuse distribution version: %s\n", FUSE_VERSION);
#endif
+#ifdef DCACHE_BUG
+printk("fuse init: DCACHE_BUG enabled\n");
+#endif
+
spin_lock_init(&fuse_lock);
res = fuse_fs_init();
if (res)
|
