From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751343AbWE2Vqb (ORCPT ); Mon, 29 May 2006 17:46:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751315AbWE2VXg (ORCPT ); Mon, 29 May 2006 17:23:36 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:20434 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1751322AbWE2VXH (ORCPT ); Mon, 29 May 2006 17:23:07 -0400 Date: Mon, 29 May 2006 23:23:28 +0200 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Arjan van de Ven , Andrew Morton Subject: [patch 05/61] lock validator: introduce WARN_ON_ONCE(cond) Message-ID: <20060529212328.GE3155@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060529212109.GA2058@elte.hu> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL autolearn=no SpamAssassin version=3.0.3 -2.8 ALL_TRUSTED Did not pass through any untrusted hosts 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Ingo Molnar add WARN_ON_ONCE(cond) to print once-per-bootup messages. Signed-off-by: Ingo Molnar Signed-off-by: Arjan van de Ven --- include/asm-generic/bug.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) Index: linux/include/asm-generic/bug.h =================================================================== --- linux.orig/include/asm-generic/bug.h +++ linux/include/asm-generic/bug.h @@ -44,4 +44,17 @@ # define WARN_ON_SMP(x) do { } while (0) #endif +#define WARN_ON_ONCE(condition) \ +({ \ + static int __warn_once = 1; \ + int __ret = 0; \ + \ + if (unlikely(__warn_once && (condition))) { \ + __warn_once = 0; \ + WARN_ON(1); \ + __ret = 1; \ + } \ + __ret; \ +}) + #endif