From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
The current code tries to optimize the setting of
KVM_REQ_PENDING_TIMER but used atomic_inc_and_test - which always
returns true unless pending had the invalid value of -1 on entry. This
patch drops the test part preserving the original semantic but
expressing it less confusingly.
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/timer.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/timer.c b/arch/x86/kvm/timer.c
index 1baed41..eea4043 100644
--- a/arch/x86/kvm/timer.c
+++ b/arch/x86/kvm/timer.c
@@ -15,9 +15,9 @@ static int __kvm_timer_fn(struct kvm_vcpu *vcpu, struct kvm_timer *ktimer)
* case anyway.
*/
if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
+ atomic_inc(&ktimer->pending);
/* FIXME: this code should not know anything about vcpus */
- if (!atomic_inc_and_test(&ktimer->pending))
- set_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
+ set_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
}
if (waitqueue_active(q))
--
1.6.3.3
--
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