Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752399AbaAIKek (ORCPT ); Thu, 9 Jan 2014 05:34:40 -0500 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:42293 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751019AbaAIKed (ORCPT ); Thu, 9 Jan 2014 05:34:33 -0500 Date: Thu, 9 Jan 2014 10:30:05 +0000 From: Will Deacon To: Stefano Stabellini Cc: "linux@arm.linux.org.uk" , "arnd@arndb.de" , "gang.chen@asianux.com" , Catalin Marinas , "jaccon.bastiaansen@gmail.com" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v3] arm: remove !CPU_V6 and !GENERIC_ATOMIC64 build dependencies for XEN Message-ID: <20140109103004.GB11089@mudshark.cambridge.arm.com> References: <1389204023-26912-1-git-send-email-stefano.stabellini@eu.citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1389204023-26912-1-git-send-email-stefano.stabellini@eu.citrix.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Stefano, On Wed, Jan 08, 2014 at 06:00:23PM +0000, Stefano Stabellini wrote: > Remove !GENERIC_ATOMIC64 build dependency: > - rename atomic64_xchg to armv7_atomic64_xchg and define it even ifdef > GENERIC_ATOMIC64; > - call armv7_atomic64_xchg directly from xen/events.h. > > Remove !CPU_V6 build dependency: > - introduce __cmpxchg8 and __cmpxchg16, compiled even ifdef > CONFIG_CPU_V6; > - implement sync_cmpxchg using __cmpxchg8 and __cmpxchg16. > > Signed-off-by: Stefano Stabellini > CC: arnd@arndb.de > CC: linux@arm.linux.org.uk > CC: will.deacon@arm.com > CC: gang.chen@asianux.com > CC: catalin.marinas@arm.com > CC: jaccon.bastiaansen@gmail.com > CC: linux-arm-kernel@lists.infradead.org > CC: linux-kernel@vger.kernel.org > I'm confused here. It looks like you want to call armv7 code in a v6 kernel. What am I missing? Will -- 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/