From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: [PATCH kvm-unit-tests v2 3/8] Introduce memory barriers. Date: Tue, 31 Aug 2010 16:37:06 +0800 Message-ID: <20100831083706.10672.49492.stgit@FreeLancer> References: <20100831083216.10672.20413.stgit@FreeLancer> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: zamsden@redhat.com, glommer@redhat.com, mtosatti@redhat.com, avi@redhat.com, kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:34344 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752420Ab0HaIhJ (ORCPT ); Tue, 31 Aug 2010 04:37:09 -0400 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o7V8b9hF026831 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 31 Aug 2010 04:37:09 -0400 In-Reply-To: <20100831083216.10672.20413.stgit@FreeLancer> Sender: kvm-owner@vger.kernel.org List-ID: Signed-off-by: Jason Wang --- lib/x86/smp.h | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/lib/x86/smp.h b/lib/x86/smp.h index c2e7350..df5fdba 100644 --- a/lib/x86/smp.h +++ b/lib/x86/smp.h @@ -1,6 +1,10 @@ #ifndef __SMP_H #define __SMP_H +#define mb() asm volatile("mfence":::"memory") +#define rmb() asm volatile("lfence":::"memory") +#define wmb() asm volatile("sfence" ::: "memory") + struct spinlock { int v; };