Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262924AbVCWUzT (ORCPT ); Wed, 23 Mar 2005 15:55:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262891AbVCWUv6 (ORCPT ); Wed, 23 Mar 2005 15:51:58 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:13199 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S262924AbVCWUtA (ORCPT ); Wed, 23 Mar 2005 15:49:00 -0500 Subject: Re: repeat a function after fixed time period From: Arjan van de Ven To: linux-os@analogic.com Cc: sounak chakraborty , linux-kernel@vger.kernel.org In-Reply-To: References: <20050323194308.8459.qmail@web53307.mail.yahoo.com> Content-Type: text/plain Date: Wed, 23 Mar 2005 21:48:54 +0100 Message-Id: <1111610935.6306.97.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Spam-Score: 4.1 (++++) X-Spam-Report: SpamAssassin version 2.63 on pentafluge.infradead.org summary: Content analysis details: (4.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.3 RCVD_NUMERIC_HELO Received: contains a numeric HELO 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1012 Lines: 44 > > This kernel code should do just fine. > > > > struct INFO { > struct timer_list timer; // For test timer > atomic_t running; // Timer is running > }; > > //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > // > // This stops the timer. This must NOT be called with a spin-lock > // held. > // > static void stop_timer() > { > if(atomic_read(&info->running)) > { > atomic_dec(&info->running); this is a race. > if(info->timer.function) > del_timer(&info->timer); you probably want del_timer_sync() here. > static void start_timer(void) > { > if(!atomic_read(&info->running)) > { > atomic_inc(&info->running); same race. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/