From 16eb4dba5eaad731fb28605a4754b5f31603e39a Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Sat, 21 May 2011 07:48:39 +0000 Subject: [PATCH] bug.h: Add WARN_RATELIMIT 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 Signed-off-by: David S. Miller Signed-off-by: Paul Gortmaker --- 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 18c435d7c082e..bf58d4cfbb301 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 -- 2.47.3