From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932227AbXGKSCo (ORCPT ); Wed, 11 Jul 2007 14:02:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1766001AbXGKSCe (ORCPT ); Wed, 11 Jul 2007 14:02:34 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:53089 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760810AbXGKSCd (ORCPT ); Wed, 11 Jul 2007 14:02:33 -0400 Date: Wed, 11 Jul 2007 11:01:54 -0700 (PDT) From: Linus Torvalds To: Martin Orr cc: Andi Kleen , Stefano Rivoir , Linux Kernel Mailing List Subject: Re: Linux 2.6.22 released In-Reply-To: <46951892.20406@martinorr.name> Message-ID: References: <4693327E.6000006@gts.it> <46947ADF.4080605@gts.it> <46951892.20406@martinorr.name> 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 On Wed, 11 Jul 2007, Martin Orr wrote: > > I have done this. The file is arch/x86_64/kernel/signal.c: if I compile > this with gcc 20070627 then everything works, if I compile it with gcc > 20070707 then udevsettle hangs. This is independent of the gcc version used > to compile the rest of the kernel. (The dates refer to versions of the > Debian gcc-4.2 package and its dependencies.) Can you do make arch/x86_64/kernel/signal.s with both compilers, and post the results somewhere? It's probably going to be so large, and have so many trivial differences (register allocation etc) that it will be hard-to-impossible to see the problem, but at least we can *try* to see if it might be obvious enough from comparing the assembly.. (Register allocation differences make comparisons like that really hard, but if the two compiler versions are close enough, they *might* end up having sufficiently similar register allocation that the stupid differences don't hide all the real differences). Linus