static void ma_put(struct ifmcaddr6 *mc)
{
	if (refcount_dec_and_test(&mc->mca_refcnt)) {
		in6_dev_put(mc->idev);
		kfree_rcu(mc, rcu);
	}
}
static void ma_put(struct ifmcaddr6 *mc)
{
	if (refcount_dec_and_test(&mc->mca_refcnt)) {
		in6_dev_put(mc->idev);
		kfree_rcu(mc, rcu);
	}
}