From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752937Ab0EKVgp (ORCPT ); Tue, 11 May 2010 17:36:45 -0400 Received: from kroah.org ([198.145.64.141]:48441 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752879Ab0EKVgl (ORCPT ); Tue, 11 May 2010 17:36:41 -0400 Date: Tue, 11 May 2010 14:36:04 -0700 From: Greg KH To: Arnd Bergmann Cc: KOSAKI Motohiro , Rusty Russell , linux-kernel@vger.kernel.org, Ken Werner , Andi Kleen , stable@kernel.org Subject: Re: [stable] cpumask: fix compat getaffinity Message-ID: <20100511213604.GA27050@kroah.com> References: <20100511104334.E572.A69D9226@jp.fujitsu.com> <20100511151526.E578.A69D9226@jp.fujitsu.com> <20100511152002.GB16561@kroah.com> <201005112013.56392.arnd@arndb.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201005112013.56392.arnd@arndb.de> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 11, 2010 at 08:13:55PM +0200, Arnd Bergmann wrote: > On Tuesday 11 May 2010 17:20:02 Greg KH wrote: > > > AFAIK, -stable is mainly used for distro and they have many and many > > > packages. we can't assume no app read /sys files directly. > > > IOW, To change /sys printing format is a bit risky change. frequently > > > compatibility breaking natually break code stability. > > > > Ah, the sysfs user/kernel API is what you are referring to here, right? > > If so, remember, any changes need to be documented in Documentation/API > > :) > > And as for distros using -stable for their releases, that's fine, they > > well know the risks/benefits for that and handle changes on their own. > > Would it make sense to use my initial patch for -stable, which reverts > the ABI back to before the change that caused the problem, but apply > the correct fix (changing the ABI throughout) for future releases? I do not know, as I really don't know what the issue is here. I trust that you, and the others, can come up with a fix for mainline properly, and if it applies to the stable tree, feel free to forward it to stable@kernel.org for submission then. thanks, greg k-h