From: Marcelo Tosatti <[email protected]>

Document that KVM_REQ_PENDING_TIMER is implicitly used during guest
entry.

Signed-off-by: Marcelo Tosatti <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>

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);
--
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