static void kvm_on_user_return(struct user_return_notifier *urn)
{
	unsigned slot;
	struct kvm_user_return_msrs *msrs
		= container_of(urn, struct kvm_user_return_msrs, urn);
	struct kvm_user_return_msr_values *values;
	unsigned long flags;

	/*
	 * Disabling irqs at this point since the following code could be
	 * interrupted and executed through kvm_arch_hardware_disable()
	 */
	local_irq_save(flags);
	if (msrs->registered) {
		msrs->registered = false;
		user_return_notifier_unregister(urn);
	}
	local_irq_restore(flags);
	for (slot = 0; slot < kvm_nr_uret_msrs; ++slot) {
		values = &msrs->values[slot];
		if (values->host != values->curr) {
			wrmsrl(kvm_uret_msrs_list[slot], values->host);
			values->curr = values->host;
		}
	}
}
static void kvm_on_user_return(struct user_return_notifier *urn)
{
	unsigned slot;
	struct kvm_user_return_msrs *msrs
		= container_of(urn, struct kvm_user_return_msrs, urn);
	struct kvm_user_return_msr_values *values;
	unsigned long flags;

	 
	local_irq_save(flags);
	if (msrs->registered) {
		msrs->registered = false;
		user_return_notifier_unregister(urn);
	}
	local_irq_restore(flags);
	for (slot = 0; slot < kvm_nr_uret_msrs; ++slot) {
		values = &msrs->values[slot];
		if (values->host != values->curr) {
			wrmsrl(kvm_uret_msrs_list[slot], values->host);
			values->curr = values->host;
		}
	}
}