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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id e18sm46511363wrw.70.2020.01.20.02.33.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jan 2020 02:33:54 -0800 (PST) From: Vitaly Kuznetsov To: linmiaohe Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com, sean.j.christopherson@intel.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com Subject: Re: [PATCH] KVM: apic: short-circuit kvm_apic_accept_pic_intr() when pic intr is accepted In-Reply-To: <1579315837-15994-1-git-send-email-linmiaohe@huawei.com> References: <1579315837-15994-1-git-send-email-linmiaohe@huawei.com> Date: Mon, 20 Jan 2020 11:33:53 +0100 Message-ID: <87sgkafmcu.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org linmiaohe writes: > From: Miaohe Lin > > Short-circuit kvm_apic_accept_pic_intr() when pic intr is accepted, there > is no need to proceed further. Also remove unnecessary var r. > > Signed-off-by: Miaohe Lin > --- > arch/x86/kvm/lapic.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c > index 679692b55f6d..502c7b0d8fdb 100644 > --- a/arch/x86/kvm/lapic.c > +++ b/arch/x86/kvm/lapic.c > @@ -2370,14 +2370,13 @@ int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu) > int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) > { > u32 lvt0 = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LVT0); > - int r = 0; > > if (!kvm_apic_hw_enabled(vcpu->arch.apic)) > - r = 1; > + return 1; > if ((lvt0 & APIC_LVT_MASKED) == 0 && > GET_APIC_DELIVERY_MODE(lvt0) == APIC_MODE_EXTINT) > - r = 1; > - return r; > + return 1; > + return 0; > } > > void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu) My eyes would've appreciated a blank line after each "return 1;" but you patch makes the code a bit nicer anyway, thanks. Reviewed-by: Vitaly Kuznetsov -- Vitaly