dm: remove superfluous smp_mb

Since set_current_state() contains a memory barrier in it,
an additional barrier isn't needed.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 52a8fd8eb17..2fe3017ba97 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2326,7 +2326,6 @@ static int dm_wait_for_completion(struct mapped_device *md, int interruptible)
         while (1) {
                 set_current_state(interruptible);
 
-                smp_mb();
                 if (!md_in_flight(md))
                         break;