KVM: halt_polling: provide a way to qualify wakeups during poll

[cascardo/linux.git] / arch / s390 / kvm / interrupt.c

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index e550404..5a80af7 100644 (file)
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -977,6 +977,11 @@ no_timer:
 
 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
 {
+       /*
+        * We cannot move this into the if, as the CPU might be already
+        * in kvm_vcpu_block without having the waitqueue set (polling)
+        */
+       vcpu->valid_wakeup = true;
        if (swait_active(&vcpu->wq)) {
                /*
                 * The vcpu gave up the cpu voluntarily, mark it as a good