Hi Stanislav, Thank you for the patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Stanislav-Fomichev/bpf-Allow-bpf... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: riscv-randconfig-r026-20210811 (attached as .config) compiler: riscv32-linux-gcc (GCC) 10.3.0 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 # https://github.com/0day-ci/linux/commit/192e9ea84066a6ef07e9d1ce72e7f597b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stanislav-Fomichev/bpf-Allow-bpf_get_netns_cookie-in-BPF_PROG_TYPE_CGROUP_SOCKOPT/20210812-062850 git checkout 192e9ea84066a6ef07e9d1ce72e7f597b920ada2 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash 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 >>): riscv32-linux-ld: kernel/bpf/cgroup.o: in function `.L31': riscv32-linux-ld: cgroup.c:(.text+0x248): undefined reference to `init_net' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org