SEL_NETIF_HASH_SIZE
for (idx = 0; idx < SEL_NETIF_HASH_SIZE; idx++)
for (i = 0; i < SEL_NETIF_HASH_SIZE; i++)
static struct list_head sel_netif_hash[SEL_NETIF_HASH_SIZE];
return (((uintptr_t)ns + ifindex) & (SEL_NETIF_HASH_SIZE - 1));