From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Subject: [PATCH 1/2] bug.h: Add WARN_RATELIMIT Date: Sat, 21 May 2011 10:48:39 -0700 Message-ID: <2dfb6f4e8110e5b09dbf4c8a1502bdf8955bb6ff.1305999731.git.joe@perches.com> References: <1305666832.1722.62.camel@Joe-Laptop> Cc: linux-arch@vger.kernel.org, "David S. Miller" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Ben Greear , Arnd Bergmann Return-path: In-Reply-To: <1305666832.1722.62.camel@Joe-Laptop> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 --- 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