linux-kernel - Re: [PATCH 4/4] KVM: x86: clean/fix memory barriers in irqchip_in

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Message-ID: <55B9D188.3020600@redhat.com>
Date:	Thu, 30 Jul 2015 09:26:00 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Steve Rutherford <srutherford@...gle.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	mtosatti@...hat.com, rkrcmar@...hat.com
Subject: Re: [PATCH 4/4] KVM: x86: clean/fix memory barriers in
 irqchip_in_kernel



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
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