static inline int ipv6_addr_loopback(const struct in6_addr *a)
{
	return (a->s6_addr32[0] | a->s6_addr32[1] |
		a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
}
static inline int ipv6_addr_loopback(const struct in6_addr *a)
{
	return (a->s6_addr32[0] | a->s6_addr32[1] |
		a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
}