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[PATCH] use smp_mb/wmb/rmb where possible

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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>
This commit is contained in:
akpm@osdl.org
2005-05-01 08:58:47 -07:00
committed by Linus Torvalds
parent 0d8d4d42f2
commit d59dd4620f
11 changed files with 31 additions and 31 deletions
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ipc/mqueue.c
+2 -2
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@@ -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;
}