Hi Oleksij, I love your patch! Yet something to improve: [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Oleksij-Rempel/provide-generic-n... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 3a1aa533f7f676aad68f8dbbbba10b9502903770 config: microblaze-randconfig-r023-20210415 (attached as .config) compiler: microblaze-linux-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 # https://github.com/0day-ci/linux/commit/588de0d11c3a08c5d379652b1a8c69ecf... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Oleksij-Rempel/provide-generic-net-selftest-support/20210415-211011 git checkout 588de0d11c3a08c5d379652b1a8c69ecf99769f9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=microblaze 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 >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org