Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933327Ab1FXBU4 (ORCPT ); Thu, 23 Jun 2011 21:20:56 -0400 Received: from claw.goop.org ([74.207.240.146]:41620 "EHLO claw.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760177Ab1FXBT0 (ORCPT ); Thu, 23 Jun 2011 21:19:26 -0400 From: Jeremy Fitzhardinge To: Peter Zijlstra Cc: Linus Torvalds , "H. Peter Anvin" , Ingo Molnar , the arch/x86 maintainers , Linux Kernel Mailing List , Nick Piggin , Jeremy Fitzhardinge Subject: [PATCH 8/8] x86/ticketlock: use xadd helper Date: Thu, 23 Jun 2011 18:19:20 -0700 Message-Id: X-Mailer: git-send-email 1.7.5.4 In-Reply-To: References: In-Reply-To: <05552e1c97739f589cb76c20b5a6565ccd506636.1308878118.git.jeremy.fitzhardinge@citrix.com> References: <05552e1c97739f589cb76c20b5a6565ccd506636.1308878118.git.jeremy.fitzhardinge@citrix.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1200 Lines: 35 From: Jeremy Fitzhardinge Signed-off-by: Jeremy Fitzhardinge --- arch/x86/include/asm/spinlock.h | 9 +-------- 1 files changed, 1 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h index dac6fc6..2d14e7c 100644 --- a/arch/x86/include/asm/spinlock.h +++ b/arch/x86/include/asm/spinlock.h @@ -71,14 +71,7 @@ static __always_inline struct __raw_tickets __ticket_spin_claim(struct arch_spin { register struct __raw_tickets tickets = { .tail = 1 }; - if (sizeof(lock->tickets.head) == sizeof(u8)) - asm volatile (LOCK_PREFIX "xaddw %w0, %1\n" - : "+r" (tickets), "+m" (lock->tickets) - : : "memory", "cc"); - else - asm volatile (LOCK_PREFIX "xaddl %0, %1\n" - : "+r" (tickets), "+m" (lock->tickets) - : : "memory", "cc"); + xadd(&lock->tickets, tickets); return tickets; } -- 1.7.5.4 -- 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/