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| author | Davidlohr Bueso <dave@stgolabs.net> | 2017-09-13 23:08:20 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-09-15 17:57:11 +0300 |
| commit | cc1b46803a671047be22f7832ef4a2bb3f63dd94 (patch) | |
| tree | c15a9fa0ebce815977ca81aa74f13024523b95d6 /arch | |
| parent | b9f67a420b3d76991592558af06e9cf1b8953b3d (diff) | |
| download | linux-cc1b46803a671047be22f7832ef4a2bb3f63dd94.tar.xz | |
kvm,lapic: Justify use of swait_active()
A comment might serve future readers.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 4 |
1 files changed, 4 insertions, 0 deletions
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); |