From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757627AbXEIM3k (ORCPT ); Wed, 9 May 2007 08:29:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756552AbXEIM3c (ORCPT ); Wed, 9 May 2007 08:29:32 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:4224 "EHLO spitz.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753152AbXEIM3b (ORCPT ); Wed, 9 May 2007 08:29:31 -0400 Date: Mon, 7 May 2007 20:02:45 +0000 From: Pavel Machek To: Thomas Gleixner Cc: Greg KH , Alan Cox , Hans-J?rgen Koch , Bill Davidsen , Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, Benedikt Spranger Subject: Re: [GIT PATCH] UIO patches for 2.6.21 Message-ID: <20070507200245.GA3868@ucw.cz> References: <20070427224957.GA17967@kroah.com> <4633A6D7.3030806@tmr.com> <200704282203.31141.hjk@linutronix.de> <20070428211515.4e9fd8c5@the-village.bc.nu> <1177792297.7646.297.camel@localhost.localdomain> <20070429012338.GA11147@suse.de> <1177835453.5791.7.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1177835453.5791.7.camel@localhost.localdomain> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > > I agree, if we make it entirely clear that the flag is nonpolitical. > > > > Hm, I don't know, what makes this different from the fact that we can > > mmap PCI device space today through the proc and sysfs entries? That's > > how X gets direct access to the hardware for a number of different > > cards, and that's pretty much the same thing as the UIO interface is > > doing. > > > > Unless you think we should also use the same "taint" flag on those > > accesses too, and if so, I have no objection. > > Right, this is just a hint, that something in user space is accessing > the hardware directly. Not a too bad idea, but pretty much useless when > we add X to the picture as it will be set always :) Some people -- like me -- use X68_fbcon over vesafb, in order not to be tainted this way. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html