Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754592Ab0GMSZa (ORCPT ); Tue, 13 Jul 2010 14:25:30 -0400 Received: from anguilla.debian.or.at ([86.59.21.37]:34151 "EHLO anguilla.debian.or.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751121Ab0GMSZ3 (ORCPT ); Tue, 13 Jul 2010 14:25:29 -0400 Date: Tue, 13 Jul 2010 20:25:27 +0200 From: Peter Palfrader To: Avi Kivity Cc: Linus Torvalds , Ingo Molnar , "H. Peter Anvin" , Greg KH , linux-kernel@vger.kernel.org, stable@kernel.org, stable-review@kernel.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Glauber Costa , Zachary Amsden , Jeremy Fitzhardinge , Marcelo Tosatti Subject: Re: [patch 134/149] x86, paravirt: Add a global synchronization point for pvclock Message-ID: <20100713182527.GG15122@anguilla.noreply.org> Mail-Followup-To: Peter Palfrader , Avi Kivity , Linus Torvalds , Ingo Molnar , "H. Peter Anvin" , Greg KH , linux-kernel@vger.kernel.org, stable@kernel.org, stable-review@kernel.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Glauber Costa , Zachary Amsden , Jeremy Fitzhardinge , Marcelo Tosatti References: <20100701175144.GA2116@kroah.com> <20100701173218.125822294@clark.site> <20100707124731.GJ15122@anguilla.noreply.org> <4C359D5A.1050906@redhat.com> <20100713102350.GW15122@anguilla.noreply.org> <4C3C68C8.4060409@redhat.com> <20100713141902.GB15122@anguilla.noreply.org> <4C3C8CE5.1080705@redhat.com> <4C3CAAC6.501@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <4C3CAAC6.501@redhat.com> X-PGP: 1024D/94C09C7F 5B00 C96D 5D54 AEE1 206B AF84 DE7A AF6E 94C0 9C7F X-Request-PGP: http://www.palfrader.org/keys/94C09C7F.asc X-Accept-Language: de, en User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1190 Lines: 28 On Tue, 13 Jul 2010, Avi Kivity wrote: > Well, current upstream uses "m": > >> case 8: \ >> asm volatile(lock "cmpxchgq %1,%2" \ >> : "=a"(__ret) \ >> : "r"(__new), "m"(*__xg(ptr)), "0"(__old) \ >> : "memory"); \ >> break; \ > > and works; I also failed to reproduce with 2.6.32.16. So I expect some > toolchain involvement. > > Peter, what gcc are you using? gcc (Debian 4.3.2-1.1) 4.3.2 -- | .''`. ** Debian GNU/Linux ** Peter Palfrader | : :' : The universal http://www.palfrader.org/ | `. `' Operating System | `- http://www.debian.org/ -- 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/