linux-kernel - [PATCH 10/12] KVM: mark memory barrier with smp_mb__after

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Message-Id: <1456319873-34182-11-git-send-email-pbonzini@redhat.com>
Date:	Wed, 24 Feb 2016 14:17:51 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:	yoshikawa_takuya_b1@....ntt.co.jp, guangrong.xiao@...ux.intel.com,
	mtosatti@...hat.com
Subject: [PATCH 10/12] KVM: mark memory barrier with smp_mb__after_atomic

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 virt/kvm/kvm_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 39c36d4f4f5c..77a73739b08e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -171,7 +171,7 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)
 		cpu = vcpu->cpu;
 
 		/* Set ->requests bit before we read ->mode */
-		smp_mb();
+		smp_mb__after_atomic();
 
 		if (cpus != NULL && cpu != -1 && cpu != me &&
 		      kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE)
-- 
1.8.3.1