This is a note to let you know that I've just added the patch titled
bug.h: Add WARN_RATELIMIT
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bug.h-add-warn_ratelimit.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From ac8da642f31961c5dbc7b6cf4053fc9c78720b05 Mon Sep 17 00:00:00 2001
From: Joe Perches <[email protected]>
Date: Sat, 21 May 2011 07:48:39 +0000
Subject: bug.h: Add WARN_RATELIMIT
From: Joe Perches <[email protected]>
[ Upstream commit b3eec79b0776e5340a3db75b34953977c7e5086e ]
Add a generic mechanism to ratelimit WARN(foo, fmt, ...) messages
using a hidden per call site static struct ratelimit_state.
Also add an __WARN_RATELIMIT variant to be able to use a specific
struct ratelimit_state.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
include/asm-generic/bug.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -165,6 +165,22 @@ extern void warn_slowpath_null(const cha
#define WARN_ON_RATELIMIT(condition, state) \
WARN_ON((condition) && __ratelimit(state))
+#define __WARN_RATELIMIT(condition, state, format...) \
+({ \
+ int rtn = 0; \
+ if (unlikely(__ratelimit(state))) \
+ rtn = WARN(condition, format); \
+ rtn; \
+})
+
+#define WARN_RATELIMIT(condition, format...) \
+({ \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ __WARN_RATELIMIT(condition, &_rs, format); \
+})
+
/*
* WARN_ON_SMP() is for cases that the warning is either
* meaningless for !SMP or may even cause failures.
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.39/net-filter-use-warn_ratelimit.patch
queue-2.6.39/bug.h-add-warn_ratelimit.patch
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