Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759772AbXELTAf (ORCPT ); Sat, 12 May 2007 15:00:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756912AbXELTA2 (ORCPT ); Sat, 12 May 2007 15:00:28 -0400 Received: from terminus.zytor.com ([192.83.249.54]:38966 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756840AbXELTA1 (ORCPT ); Sat, 12 May 2007 15:00:27 -0400 Message-ID: <46460E9E.9020308@zytor.com> Date: Sat, 12 May 2007 11:59:42 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: "Eric W. Biederman" CC: Alexander van Heukelum , "Antonino A. Daplas" , Andi Kleen , Andrew Morton , Matt Domsch , Vivek Goyal , James Bottomley , Linux Kernel Mailing List Subject: Re: x86 setup rewrite tree ready for flamage^W review References: <464158E9.2000207@zytor.com> <1178806235.18785.1189115515@webmail.messagingengine.com> <46435F8A.1040203@zytor.com> <20070510220406.GA21110@mailshack.com> <4643A128.30302@zytor.com> <20070512122137.GA25944@mailshack.com> <464602DC.4050603@zytor.com> In-Reply-To: X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 912 Lines: 25 Eric W. Biederman wrote: > > Even on 386 and 486 class cpus? > Yes, even on 386 and 486 class CPUs. I have personally tested this on machines as old as the original "double sigma" 386-16. > To some extent if the rules don't change it makes sense for them to > copy the information from one generation to the next of the architecture. > Even if the current cpus don't really care. > > I guess I just don't see the sense in taking chances if we don't have > to, and I don't see any real advantage of doing a data segment reload > before the jump. It makes the code cleaner -- more debuggable -- by introducing clean separation between 16- and 32-bit code. -hpa - 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/