The patch titled
vfs: fix unconditional write_super() call in file_fsync()
has been removed from the -mm tree. Its filename was
vfs-fix-unconditional-write_super-call-in-file_fsync.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
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Subject: vfs: fix unconditional write_super() call in file_fsync()
From: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
We need to check ->s_dirt before calling write_super(). It became the cause
of an unneeded write.
This bug was noticed by Sudhanshu Saxena.
Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/sync.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/sync.c~vfs-fix-unconditional-write_super-call-in-file_fsync fs/sync.c
--- a/fs/sync.c~vfs-fix-unconditional-write_super-call-in-file_fsync
+++ a/fs/sync.c
@@ -64,7 +64,7 @@ int file_fsync(struct file *filp, struct
/* sync the superblock to buffers */
sb = inode->i_sb;
lock_super(sb);
- if (sb->s_op->write_super)
+ if (sb->s_dirt && sb->s_op->write_super)
sb->s_op->write_super(sb);
unlock_super(sb);
_
Patches currently in -mm which might be from hirofumi@xxxxxxxxxxxxxxxxxx are
origin.patch
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