From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767937AbXEEBp6 (ORCPT ); Fri, 4 May 2007 21:45:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767940AbXEEBp6 (ORCPT ); Fri, 4 May 2007 21:45:58 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:37533 "EHLO ebiederm.dsl.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767937AbXEEBp5 (ORCPT ); Fri, 4 May 2007 21:45:57 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: "H. Peter Anvin" Cc: Jeremy Fitzhardinge , Rusty Russell , Andi Kleen , Linux Kernel Mailing List Subject: Re: [PATCH] i386: always clear bss References: <463AED07.1000505@goop.org> <463B49F0.401@goop.org> <463B5643.1040204@zytor.com> <463B6888.20001@zytor.com> <463B6CCE.4050800@zytor.com> <463BBEEE.3000903@zytor.com> Date: Fri, 04 May 2007 19:45:38 -0600 In-Reply-To: <463BBEEE.3000903@zytor.com> (H. Peter Anvin's message of "Fri, 04 May 2007 16:17:02 -0700") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "H. Peter Anvin" writes: > Eric W. Biederman wrote: >> >> My notes show 0x5c reserved for additional apm_bios_info, although >> of the top of my head I don't know how realistic that is. >> >> 0x1e4 does look available. >> >> It has been a long time since I made that choice, and I do see that >> looking at struct screen_info I did remember to document that I was >> using 0x3c, even in your structure. >> >> It is all internal to our boot process and external code isn't going >> to use it so we can change it if we feel like. >> > > I don't see the actual instruction that does that anywhere in my tree, > which was branched from Andi's "for-linus" git tree, but I have reserved > 0x1e4 for that purpose as "scratch". I have this vague memory of liking 0x3c because if we do happen to use more room then we intended the consequences are pretty benign. But that is a pretty minor consequence. Eric