Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760842AbWLHSrZ (ORCPT ); Fri, 8 Dec 2006 13:47:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760845AbWLHSrY (ORCPT ); Fri, 8 Dec 2006 13:47:24 -0500 Received: from smtp.osdl.org ([65.172.181.25]:48219 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760842AbWLHSrX (ORCPT ); Fri, 8 Dec 2006 13:47:23 -0500 Date: Fri, 8 Dec 2006 10:46:17 -0800 (PST) From: Linus Torvalds To: David Howells cc: Christoph Lameter , Russell King , Nick Piggin , akpm@osdl.org, linux-arm-kernel@lists.arm.linux.org.uk, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it In-Reply-To: <4595.1165597017@redhat.com> Message-ID: References: <20061206164314.19870.33519.stgit@warthog.cambridge.redhat.com> <20061206190025.GC9959@flint.arm.linux.org.uk> <20061206195820.GA15281@flint.arm.linux.org.uk> <4577DF5C.5070701@yahoo.com.au> <20061207150303.GB1255@flint.arm.linux.org.uk> <4578BD7C.4050703@yahoo.com.au> <20061208085634.GA25751@flint.arm.linux.org.uk> <4595.1165597017@redhat.com> 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 Content-Length: 482 Lines: 16 On Fri, 8 Dec 2006, David Howells wrote: > > In fact I think more things have LL/SC than have CMPXCHG. But you cannot expose ll/sc to C, so that's a bogus argument. If you do ll/sc, you need to program in assembly language. Linus - 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/