diff options
Diffstat (limited to 'arch/x86/kvm/i8254.c')
| -rw-r--r-- | arch/x86/kvm/i8254.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 9e3391e9a1b7..c0f7872a9124 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -198,14 +198,11 @@ static int __pit_timer_fn(struct kvm_kpit_state *ps) struct kvm_vcpu *vcpu0 = ps->pit->kvm->vcpus[0]; struct kvm_kpit_timer *pt = &ps->pit_timer; - atomic_inc(&pt->pending); - smp_mb__after_atomic_inc(); - if (vcpu0) { + if (!atomic_inc_and_test(&pt->pending)) set_bit(KVM_REQ_PENDING_TIMER, &vcpu0->requests); - if (waitqueue_active(&vcpu0->wq)) { - vcpu0->arch.mp_state = KVM_MP_STATE_RUNNABLE; - wake_up_interruptible(&vcpu0->wq); - } + if (vcpu0 && waitqueue_active(&vcpu0->wq)) { + vcpu0->arch.mp_state = KVM_MP_STATE_RUNNABLE; + wake_up_interruptible(&vcpu0->wq); } pt->timer.expires = ktime_add_ns(pt->timer.expires, pt->period); |