From d59dd4620fb8d6422555a9e2b82a707718e68327 Mon Sep 17 00:00:00 2001
From: "akpm@osdl.org" <akpm@osdl.org>
Date: Sun, 1 May 2005 08:58:47 -0700
Subject: [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>
---
 kernel/timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'kernel/timer.c')

diff --git a/kernel/timer.c b/kernel/timer.c
index ecb3d67c0e1..207aa4f0aa1 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1007,7 +1007,7 @@ asmlinkage long sys_getppid(void)
 		 * Make sure we read the pid before re-reading the
 		 * parent pointer:
 		 */
-		rmb();
+		smp_rmb();
 		parent = me->group_leader->real_parent;
 		if (old != parent)
 			continue;
-- 
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