IP6_TUNNEL_HASH_SIZE_SHIFT   64 net/ipv6/ip6_tunnel.c #define IP6_TUNNEL_HASH_SIZE (1 << IP6_TUNNEL_HASH_SIZE_SHIFT)
IP6_TUNNEL_HASH_SIZE_SHIFT   74 net/ipv6/ip6_tunnel.c 	return hash_32(hash, IP6_TUNNEL_HASH_SIZE_SHIFT);