KVM: return if kvm_vcpu_wake_up() did wake up the VCPU
No need to kick a VCPU that we have just woken up. Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Reviewed-by: NAndrew Jones <drjones@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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