Hi Daniel, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on 10b82d5176488acee2820e5a2cf0f2ec5c3488b6] url: https://github.com/0day-ci/linux/commits/Daniel-Latypov/kunit-introduce-c... base: 10b82d5176488acee2820e5a2cf0f2ec5c3488b6 config: arc-randconfig-r025-20200917 (attached as .config) compiler: arceb-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 >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org