From mboxrd@z Thu Jan  1 00:00:00 1970
From: Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
Subject: Re: [PATCH 5/5] KVM: add kvm_request_pending
Date: Fri, 17 Feb 2017 15:59:21 +0100
Message-ID: <20170217145920.GA28391@potion>
References: <20170216160449.13094-1-rkrcmar@redhat.com>
 <20170216160449.13094-6-rkrcmar@redhat.com>
 <20170217095146.xmp4e5m22qozhq2i@kamzik.brq.redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        Paolo Bonzini <pbonzini@redhat.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Cornelia Huck <cornelia.huck@de.ibm.com>,
        James Hogan <james.hogan@imgtec.com>,
        Paul Mackerras <paulus@ozlabs.org>,
        Christoffer Dall <christoffer.dall@linaro.org>
To: Andrew Jones <drjones@redhat.com>
Return-path: <linux-kernel-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <20170217095146.xmp4e5m22qozhq2i@kamzik.brq.redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

2017-02-17 10:51+0100, Andrew Jones:
> On Thu, Feb 16, 2017 at 05:04:49PM +0100, Radim Krčmář wrote:
> ...
>> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
>> index 2cc438685af8..563cf964dc5c 100644
>> --- a/include/linux/kvm_host.h
>> +++ b/include/linux/kvm_host.h
>> @@ -1101,6 +1101,11 @@ static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
>>   * should contain kvm_vcpu_kick().
>>   */
>>  
>> +static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
>> +{
>> +	return vcpu->requests;
> 
> How about wrapping this with READ_ONCE for good measure?

Sounds good; I don't think that callers would want stale values, thanks.