dummy_ip6_datagram_recv_ctl 260 net/ipv6/ping.c pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl; dummy_ip6_datagram_recv_ctl 261 net/ipv6/ping.c pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl;