udp6_ehashfn
INDIRECT_CALLABLE_DECLARE(inet6_ehashfn_t udp6_ehashfn);
phash = INDIRECT_CALL_INET(ehashfn, udp6_ehashfn, inet6_ehashfn,
&refcounted, udp6_ehashfn);
new_hash4 = udp6_ehashfn(sock_net(sk),
saddr, sport, daddr, hnum, udp6_ehashfn);
hash4 = udp6_ehashfn(net, daddr, hnum, saddr, sport);
hash = udp6_ehashfn(net, &sk->sk_v6_rcv_saddr, sk->sk_num,
udp6_ehashfn);