Messages in this thread Patch in this message | | | From | Joe Perches <> | Subject | [PATCH 1/2] bug.h: Add WARN_RATELIMIT | Date | Sat, 21 May 2011 10:48:39 -0700 |
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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> --- include/asm-generic/bug.h | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index e5a3f58..12b250c 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -165,6 +165,22 @@ 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); \ +}) + /* * WARN_ON_SMP() is for cases that the warning is either * meaningless for !SMP or may even cause failures. -- 1.7.5.rc3.dirty
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