Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758611AbZGCSZt (ORCPT ); Fri, 3 Jul 2009 14:25:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756264AbZGCSZm (ORCPT ); Fri, 3 Jul 2009 14:25:42 -0400 Received: from one.firstfloor.org ([213.235.205.2]:57927 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756116AbZGCSZm (ORCPT ); Fri, 3 Jul 2009 14:25:42 -0400 To: Ingo Molnar Cc: Arjan van de Ven , Eric Dumazet , Linus Torvalds , mingo@redhat.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH -tip] x86: atomic64: inline atomic64_read() From: Andi Kleen References: <4A4E1AA2.30002@gmail.com> <20090703180450.GB3405@elte.hu> <20090703111033.6e9627de@infradead.org> <20090703181815.GC3405@elte.hu> Date: Fri, 03 Jul 2009 20:25:45 +0200 In-Reply-To: <20090703181815.GC3405@elte.hu> (Ingo Molnar's message of "Fri, 3 Jul 2009 20:18:15 +0200") Message-ID: <87k52paaja.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 592 Lines: 18 Ingo Molnar writes: > > Is the same true of XADD as well? If yes then we can remove the lock > prefix from those as well - there's a few uses of that on 32-bit and > 64-bit as well. XADD also has no implicit LOCK. AFAIK the implicit semantics are only true for XCHG. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- 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/