Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756589Ab1DHMZy (ORCPT ); Fri, 8 Apr 2011 08:25:54 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:37218 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756221Ab1DHMZx (ORCPT ); Fri, 8 Apr 2011 08:25:53 -0400 Date: Fri, 8 Apr 2011 13:25:41 +0100 From: Alan Cox To: Nat Gurumoorthy Cc: Jean Delvare , Guenter Roeck , Wim Van Sebroeck , Mike Waychison , lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org Subject: Re: [PATCH] Make all it87 drivers SMP safe. Message-ID: <20110408132541.39042e95@lxorguk.ukuu.org.uk> In-Reply-To: <1302038697-28985-1-git-send-email-natg@google.com> References: <1302038697-28985-1-git-send-email-natg@google.com> X-Mailer: Claws Mail 3.7.8 (GTK+ 2.22.0; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 732 Lines: 22 > attempts to serialize access to the hardware by defining a global spinlock > it87_io_lock in a file it87_lock.c. This lock has to be acquired by each > of the it87 drivers before it can access the hardware. We have defined I think this needs a NAK The resource handler can do this for you and would ensure proper behaviour. See IORESOURCE_MUXED Providing the it87 drivers request the resources (which they need to do anyway!) and use IORESOURCE_MUXED, it should all work ? Alan -- 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/