KVM: LAPIC: Don't need to wakeup vCPU twice afer timer fire

kvm_set_pending_timer() will take care to wake up the sleeping vCPU which
has pending timer, don't need to check this in apic_timer_expired() again.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 0aa158657f20cff83270f4251d1294030076c1bb..685d17c1146106a5ebf8333c02bd5f029a47d071 100644 (file)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1548,7 +1548,6 @@ static void kvm_apic_inject_pending_timer_irqs(struct kvm_lapic *apic)
 static void apic_timer_expired(struct kvm_lapic *apic)
 {
        struct kvm_vcpu *vcpu = apic->vcpu;
-       struct swait_queue_head *q = &vcpu->wq;
        struct kvm_timer *ktimer = &apic->lapic_timer;
 
        if (atomic_read(&apic->lapic_timer.pending))
@@ -1566,13 +1565,6 @@ static void apic_timer_expired(struct kvm_lapic *apic)
 
        atomic_inc(&apic->lapic_timer.pending);
        kvm_set_pending_timer(vcpu);
-
-       /*
-        * For x86, the atomic_inc() is serialized, thus
-        * using swait_active() is safe.
-        */
-       if (swait_active(q))
-               swake_up_one(q);
 }
 
 static void start_sw_tscdeadline(struct kvm_lapic *apic)