static void hwsim_exit_netlink(void)
{
	/* unregister the notifier */
	netlink_unregister_notifier(&hwsim_netlink_notifier);
	/* unregister the family */
	genl_unregister_family(&hwsim_genl_family);
}

The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.