int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex,
			  const struct in6_addr *addr, unsigned int mode)
{
	return __ipv6_sock_mc_join(sk, ifindex, addr, mode);
}
int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex,
			  const struct in6_addr *addr, unsigned int mode)
{
	return __ipv6_sock_mc_join(sk, ifindex, addr, mode);
}