From: Mike Galbraith <efault@gmx.de>

We shouldn't use WB_SYNC_ALL if the caller is asking for asynchronous
treatment.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/fs-writeback.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN fs/fs-writeback.c~write_inode_now-avoid-unnecessary-synchronous-write fs/fs-writeback.c
--- a/fs/fs-writeback.c~write_inode_now-avoid-unnecessary-synchronous-write
+++ a/fs/fs-writeback.c
@@ -655,7 +655,7 @@ int write_inode_now(struct inode *inode,
 	int ret;
 	struct writeback_control wbc = {
 		.nr_to_write = LONG_MAX,
-		.sync_mode = WB_SYNC_ALL,
+		.sync_mode = sync ? WB_SYNC_ALL : WB_SYNC_NONE,
 		.range_start = 0,
 		.range_end = LLONG_MAX,
 	};
_