[kbuild-all] Re: [PATCH bpf-next v3 05/15] bpf: add bpf_skc_to_tcp6_sock() helper

Hi Yonghong, I love your patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Yonghong-Song/implement-bpf-iter... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: arc-defconfig (attached as .config) compiler: arc-elf-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arc-elf-ld: net/core/filter.o: in function `init_btf_sock_ids': filter.c:(.text+0xaf22): undefined reference to `btf_find_by_name_kind' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org