taglinefilesource code
register_firewall32include/linux/firewall.hextern int register_firewall(int pf, struct firewall_ops *fw);
register_firewall347kernel/ksyms.cX(register_firewall),
register_firewall1700net/ipv4/ip_fw.cif(register_firewall(PF_INET,&ipfw_ops)<0)