From: Jan Blunck <jblunck@xxxxxxx>
This moves the get_cpu() call down to be called after we wake up the
waiters. Therefore the waitqueue locks can savely be rt mutex.
Signed-off-by: Jan Blunck <jblunck@xxxxxxx>
Signed-off-by: Sven-Thorsten Dietrich <sven@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Index: kvm/arch/x86/kvm/x86.c
===================================================================
--- kvm.orig/arch/x86/kvm/x86.c
+++ kvm/arch/x86/kvm/x86.c
@@ -4544,7 +4544,7 @@ static void vcpu_kick_intr(void *info)
void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
{
int ipi_pcpu = vcpu->cpu;
- int cpu = get_cpu();
+ int cpu;
if (waitqueue_active(&vcpu->wq)) {
wake_up_interruptible(&vcpu->wq);
@@ -4554,6 +4554,7 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu
* We may be called synchronously with irqs disabled in guest mode,
* So need not to call smp_call_function_single() in that case.
*/
+ cpu = get_cpu();
if (vcpu->guest_mode && vcpu->cpu != cpu)
smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
put_cpu();
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
