From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753274Ab1GHFV4 (ORCPT ); Fri, 8 Jul 2011 01:21:56 -0400 Received: from cantor2.suse.de ([195.135.220.15]:41512 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751527Ab1GHFAW (ORCPT ); Fri, 8 Jul 2011 01:00:22 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Thu Jul 7 17:16:53 2011 Message-Id: <20110708001653.241790532@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Thu, 07 Jul 2011 17:15:37 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Joe Perches , "David S. Miller" Subject: [005/107] bug.h: Add WARN_RATELIMIT In-Reply-To: <20110708001740.GA14031@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.39-stable review patch. If anyone has any objections, please let us know. ------------------ From: Joe Perches [ 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 --- include/asm-generic/bug.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -165,6 +165,22 @@ extern void warn_slowpath_null(const cha #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.