Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1426169AbWLHTit (ORCPT ); Fri, 8 Dec 2006 14:38:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1426166AbWLHTit (ORCPT ); Fri, 8 Dec 2006 14:38:49 -0500 Received: from smtp.osdl.org ([65.172.181.25]:54200 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1426169AbWLHTir (ORCPT ); Fri, 8 Dec 2006 14:38:47 -0500 Date: Fri, 8 Dec 2006 11:37:45 -0800 (PST) From: Linus Torvalds To: Russell King cc: Christoph Lameter , David Howells , 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: <20061208193116.GI31068@flint.arm.linux.org.uk> Message-ID: References: <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> <20061208171816.GG31068@flint.arm.linux.org.uk> <20061208193116.GI31068@flint.arm.linux.org.uk> 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: 654 Lines: 17 On Fri, 8 Dec 2006, Russell King wrote: > > I utterly disagree. I could code atomic_add() as: Sure. And Alpha could do that too. If you write the C code a specific way, you can make it work. That does NOT mean that you can expose it widely as a portable interface - it's still just a very _nonportable_ interface that you use internally within one architecture to implement other interfaces. 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/