From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754827AbYJFO6A (ORCPT ); Mon, 6 Oct 2008 10:58:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753086AbYJFO5v (ORCPT ); Mon, 6 Oct 2008 10:57:51 -0400 Received: from casper.infradead.org ([85.118.1.10]:33166 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752953AbYJFO5v (ORCPT ); Mon, 6 Oct 2008 10:57:51 -0400 Date: Mon, 6 Oct 2008 07:57:38 -0700 From: Arjan van de Ven To: Alan Cox Cc: Maxim Levitsky , linux-kernel@vger.kernel.org Subject: Re: RFC: banning device driver reserved resources from /dev/mem Message-ID: <20081006075738.318a983f@infradead.org> In-Reply-To: <20081006153825.66e50770@lxorguk.ukuu.org.uk> References: <20081005180154.7cc12486@infradead.org> <20081006102739.16d1a434@lxorguk.ukuu.org.uk> <48EA1540.8060409@gmail.com> <20081006144835.6e58f73a@lxorguk.ukuu.org.uk> <20081006065213.76dc729a@infradead.org> <20081006150122.3860cae1@lxorguk.ukuu.org.uk> <20081006070543.23b14828@infradead.org> <20081006151411.05ed5f50@lxorguk.ukuu.org.uk> <20081006072437.5d1360dd@infradead.org> <20081006153825.66e50770@lxorguk.ukuu.org.uk> Organization: Intel X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.12; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > For debug tools that would be almost all drivers, and for distribution > use that needs to be a runtime selection. is boottime (read: kernel parameter) ok ? it would totally make sense to have a kernel boot parameter that disables all /dev/mem sanity checks. > > For the non share-resource-with case what occurs if /dev/mem is active > when the driver is loaded ? that's a hard case but probably not the most interesting case; drivers get loaded early thankfully. (yes revoke is hard ;( ) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org