From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763412AbXGYGvU (ORCPT ); Wed, 25 Jul 2007 02:51:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753841AbXGYGvM (ORCPT ); Wed, 25 Jul 2007 02:51:12 -0400 Received: from mtagate5.uk.ibm.com ([195.212.29.138]:47859 "EHLO mtagate5.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752776AbXGYGvK (ORCPT ); Wed, 25 Jul 2007 02:51:10 -0400 Date: Wed, 25 Jul 2007 08:50:39 +0200 From: Heiko Carstens To: David Miller Cc: jeremy@goop.org, hpa@zytor.com, kaos@ocs.com.au, xyzzy@speakeasy.org, viro@ftp.linux.org.uk, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [PATCH][RFC] getting rid of stupid loop in BUG() Message-ID: <20070725065039.GA8555@osiris.boeblingen.de.ibm.com> References: <21803.1185331847@ocs10w.ocs.com.au> <46A6DB04.3000003@zytor.com> <46A6ECB7.7090208@goop.org> <20070724.232914.56812376.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070724.232914.56812376.davem@davemloft.net> User-Agent: Mutt/1.5.15 (2007-04-06) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 24, 2007 at 11:29:14PM -0700, David Miller wrote: > From: Jeremy Fitzhardinge > Date: Tue, 24 Jul 2007 23:24:55 -0700 > > > H. Peter Anvin wrote: > > > How far back was __builtin_trap() supported? > > > > I think its relatively recent, but it might be within our supported > > compiler window. > > I'm pretty sure it is. We had this in include/asm-s390/bug.h to avoid compile errors with gcc 3.2: +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) + __builtin_trap(); +#else + asm volatile(".long 0"); +#endif