siphash_key_is_zero  511 net/ipv4/route.c 	if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key)))
siphash_key_is_zero   28 net/ipv6/output_core.c 	if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key)))