Messages in this thread Patch in this message | | | From | Paul Gortmaker <> | Subject | [34-longterm 099/179] bug.h: Add WARN_RATELIMIT | Date | Mon, 14 May 2012 22:13:15 -0400 |
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From: Joe Perches <joe@perches.com>
------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. -------------------
commit b3eec79b0776e5340a3db75b34953977c7e5086e upstream.
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 <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- include/asm-generic/bug.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 18c435d..bf58d4c 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -135,6 +135,22 @@ extern void warn_slowpath_null(const char *file, const int line); #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); \ +}) + #ifdef CONFIG_SMP # define WARN_ON_SMP(x) WARN_ON(x) #else -- 1.7.9.6
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