static void kvm_start_pvclock_update(struct kvm *kvm)
{
	kvm_make_mclock_inprogress_request(kvm);

	/* no guest entries from this point */
	__kvm_start_pvclock_update(kvm);
}
static void kvm_start_pvclock_update(struct kvm *kvm)
{
	kvm_make_mclock_inprogress_request(kvm);

	 
	__kvm_start_pvclock_update(kvm);
}