From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH 4/4] KVM: x86: clean/fix memory barriers in
 irqchip_in_kernel
Date: Thu, 30 Jul 2015 09:26:00 +0200
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Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
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To: Steve Rutherford <srutherford@google.com>
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On 30/07/2015 05:32, Steve Rutherford wrote:
>> > +		/* Write kvm->irq_routing before kvm->arch.vpic.  */
>> > +		smp_wmb();
> I assume this pairs with irqchip_in_kernel? 

Yes, see the comment added there by this same patch ("read
kvm->arch.vpic before kvm->irq_routing").

Paolo