From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753127AbbHDP4X (ORCPT ); Tue, 4 Aug 2015 11:56:23 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:46843 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752770AbbHDP4V (ORCPT ); Tue, 4 Aug 2015 11:56:21 -0400 Message-ID: <55C0E0A1.4060601@roeck-us.net> Date: Tue, 04 Aug 2015 08:56:17 -0700 From: Guenter Roeck User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: =?windows-1252?Q?Uwe_Kleine-K=F6nig?= CC: linux-watchdog@vger.kernel.org, Wim Van Sebroeck , linux-kernel@vger.kernel.org, Timo Kokkonen , linux-doc@vger.kernel.org, Jonathan Corbet , kernel@pengutronix.de Subject: Re: [PATCH 3/8] watchdog: Introduce WDOG_RUNNING flag References: <1438654414-29259-1-git-send-email-linux@roeck-us.net> <1438654414-29259-4-git-send-email-linux@roeck-us.net> <20150804154104.GT9999@pengutronix.de> In-Reply-To: <20150804154104.GT9999@pengutronix.de> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Authenticated_sender: linux@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: linux@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Uwe, On 08/04/2015 08:41 AM, Uwe Kleine-König wrote: > Hello, > > On Mon, Aug 03, 2015 at 07:13:29PM -0700, Guenter Roeck wrote: >> The WDOG_RUNNING flag is expected to be set by watchdog drivers if >> the hardware watchdog is running. If the flag is set, the watchdog >> subsystem will ping the watchdog even if the watchdog device is closed. >> >> The watchdog driver stop function is now optional and may be omitted >> if the watchdog can not be stopped. If stopping the watchdog is not >> possible but the driver implements a stop function, it is responsible >> to set the WDOG_RUNNING flag in its stop function. >> >> Cc: Timo Kokkonen >> Cc: Uwe Kleine-König >> Signed-off-by: Guenter Roeck >> --- >> Documentation/watchdog/watchdog-kernel-api.txt | 19 ++++++++----- >> drivers/watchdog/watchdog_core.c | 2 +- >> drivers/watchdog/watchdog_dev.c | 39 ++++++++++++++++++++------ >> include/linux/watchdog.h | 7 +++++ >> 4 files changed, 50 insertions(+), 17 deletions(-) > Another thing that I noticed just now after looking at a later patch in > this series: Conceptually that worker stuff better fits into > watchdog_core.c than watchdog_dev.c, doesn't it? But maybe this > separation doesn't make sense anyhow? > I actually started with that approach. Problem is that the functionality added by the patch set is to a large degree associated with code in watchdog_dev.c. I would have to export static functions from watchdog_dev.c (such as _watchdog_ping), and I would have to export some of the worker functions (such as watchdog_update_worker) if the code would be in watchdog_core.c. On the other side, when adding the code to watchdog_dev.c, I did not have to export any functions. So adding the code there seemed to make more sense to me. Thanks, Guenter