Messages in this thread Patch in this message | | | From | Davidlohr Bueso <> | Subject | [PATCH 3/7] kvm,lapic: Justify use of swait_activate() | Date | Wed, 13 Sep 2017 13:08:20 -0700 |
| |
A comment might serve future readers.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de> --- arch/x86/kvm/lapic.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index aaf10b6f5380..69c5612be786 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -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); -- 2.12.0
| |