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kvm,lapic: Justify use of swait_active()

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A comment might serve future readers.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Davidlohr Bueso 2017-09-13 13:08:20 -07:00 committed by Paolo Bonzini
parent b9f67a420b
commit cc1b46803a
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kvm/lapic.c
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@ -1324,6 +1324,10 @@ 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(q);