From ca62683d3b5f66f89e8b85ff2329cb1794d6c04c 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 [ 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 Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman Signed-off-by: Andi Kleen --- 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 c2c9ba032d4..205e167804c 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -53,6 +53,22 @@ struct bug_entry { #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0) #endif +#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(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report * significant issues that need prompt attention if they should ever -- 2.11.4.GIT