From a959f00d13e5516f21e684ca548a4f0e9abd3f8e Mon Sep 17 00:00:00 2001
From: Yong Zhang <yong.zhang@windriver.com>
Date: Tue, 6 Apr 2010 14:35:03 -0700
Subject: [PATCH] ratelimit: fix the return value when __ratelimit() fails to
 acquire the lock

The log of commit 5e557547bcf5423c27f8d5cbe8d9fd76b455c10a ("ratelimit:
Fix/allow use in atomic contexts"), indicates that we want to suppress the
callback when the trylock fails.

Signed-off-by: Yong Zhang <yong.zhang@windriver.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/ratelimit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ratelimit.c b/lib/ratelimit.c
index b4cd24ff9b297..027a03f4c56d4 100644
--- a/lib/ratelimit.c
+++ b/lib/ratelimit.c
@@ -40,7 +40,7 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func)
 	 * the entity that is holding the lock already:
 	 */
 	if (!spin_trylock_irqsave(&rs->lock, flags))
-		return 1;
+		return 0;
 
 	if (!rs->begin)
 		rs->begin = jiffies;
-- 
2.39.5