gifconf          2959 include/linux/netdevice.h int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
gifconf            38 net/core/dev_ioctl.c int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
gifconf            42 net/core/dev_ioctl.c 	gifconf_list[family] = gifconf;