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Subject[PATCH] Remove useless wmb() memory barrier
wake_up's implementation does an implicit memory barrier and I think
that's the only sane semantics as the caller shouldn't have to worry.
So this write memory barrier is useless.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index b93265b..33800c7 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);
}

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