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authorMarcelo Tosatti <mtosatti@redhat.com>2010-03-23 14:15:53 -0300
committerAvi Kivity <avi@redhat.com>2010-05-17 12:16:40 +0300
commit041b1359a29b9301bc8baed6efcdbad29f80f6af (patch)
tree2fa33a94b066627e9f963e8e840eed86c649e6bb /arch/x86/kvm/timer.c
parentde3e6480f76804fe06d460ddb1920c7daa07f29b (diff)
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KVM: x86: document KVM_REQ_PENDING_TIMER usage
Document that KVM_REQ_PENDING_TIMER is implicitly used during guest entry. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/timer.c')
-rw-r--r--arch/x86/kvm/timer.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/timer.c b/arch/x86/kvm/timer.c
index eea4043..4ddadb1 100644
--- a/arch/x86/kvm/timer.c
+++ b/arch/x86/kvm/timer.c
@@ -12,7 +12,8 @@ static int __kvm_timer_fn(struct kvm_vcpu *vcpu, struct kvm_timer *ktimer)
/*
* There is a race window between reading and incrementing, but we do
* not care about potentially loosing timer events in the !reinject
- * case anyway.
+ * case anyway. Note: KVM_REQ_PENDING_TIMER is implicitly checked
+ * in vcpu_enter_guest.
*/
if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
atomic_inc(&ktimer->pending);