[PATCH] use smp_mb/wmb/rmb where possible

Replace a number of memory barriers with smp_ variants.  This means we won't
take the unnecessary hit on UP machines.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index cb0cd3cf3b5a..33f71520b89c 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -767,7 +767,7 @@ static inline void pipelined_send(struct mqueue_inode_info *info,
         list_del(&receiver->list);
         receiver->state = STATE_PENDING;
         wake_up_process(receiver->task);
-        wmb();
+        smp_wmb();
         receiver->state = STATE_READY;
 }
 
@@ -786,7 +786,7 @@ static inline void pipelined_receive(struct mqueue_inode_info *info)
         list_del(&sender->list);
         sender->state = STATE_PENDING;
         wake_up_process(sender->task);
-        wmb();
+        smp_wmb();
         sender->state = STATE_READY;
 }