[XFS] Remove useless memory barrier

wake_up's implementation does an implicit memory barrier so the explicit
memory barrier is not needed in vfs_sync_worker.

Patch provided by Ralf Baechle.

SGI-PV: 960867
SGI-Modid: xfs-linux-melb:xfs-kern:28032a

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 003e5f29d684..f3ad51602ebb 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -553,7 +553,6 @@ vfs_sync_worker(
                 error = bhv_vfs_sync(vfsp, SYNC_FSDATA | SYNC_BDFLUSH | \
                                         SYNC_ATTR | SYNC_REFCACHE, NULL);
         vfsp->vfs_sync_seq++;
-        wmb();
         wake_up(&vfsp->vfs_wait_single_sync_task);
 }