ipv6_icmp_sysctl_init 608 include/net/ipv6.h extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net); ipv6_icmp_sysctl_init 80 net/ipv6/sysctl_net_ipv6.c ipv6_icmp_table = ipv6_icmp_sysctl_init(net);