gifconf_func_t   2959 include/linux/netdevice.h int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
gifconf_func_t     27 net/core/dev_ioctl.c static gifconf_func_t *gifconf_list[NPROTO];
gifconf_func_t     38 net/core/dev_ioctl.c int register_gifconf(unsigned int family, gifconf_func_t *gifconf)