KVM: apic: reuse smp_wmb() in kvm_make_request()

kvm_make_request() provides smp_wmb() so pending_events changes are
guaranteed to be visible.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index eafc631..afcd30d 100644 (file)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1080,9 +1080,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
                        result = 1;
                        /* assumes that there are only KVM_APIC_INIT/SIPI */
                        apic->pending_events = (1UL << KVM_APIC_INIT);
-                       /* make sure pending_events is visible before sending
-                        * the request */
-                       smp_wmb();
                        kvm_make_request(KVM_REQ_EVENT, vcpu);
                        kvm_vcpu_kick(vcpu);
                }