From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753983AbcCMD1O (ORCPT ); Sat, 12 Mar 2016 22:27:14 -0500 Received: from mga01.intel.com ([192.55.52.88]:59690 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753928AbcCMD05 (ORCPT ); Sat, 12 Mar 2016 22:26:57 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,328,1455004800"; d="scan'208";a="668502248" From: Lan Tianyu To: gleb@kernel.org, pbonzini@redhat.com, guangrong.xiao@linux.intel.com Cc: Lan Tianyu , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/7] KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request() Date: Sun, 13 Mar 2016 11:10:26 +0800 Message-Id: <1457838631-26775-4-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1457838631-26775-1-git-send-email-tianyu.lan@intel.com> References: <1457838631-26775-1-git-send-email-tianyu.lan@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Lan Tianyu --- virt/kvm/kvm_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 1eae052..ec5aa8d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -170,8 +170,8 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req) kvm_make_request(req, vcpu); cpu = vcpu->cpu; - /* Set ->requests bit before we read ->mode */ - smp_mb(); + /* Set ->requests bit before we read ->mode. */ + smp_mb__after_atomic(); if (cpus != NULL && cpu != -1 && cpu != me && kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE) -- 1.8.4.rc0.1.g8f6a3e5.dirty