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: arm-randconfig-r013-20200917 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0ff28fa6a75617d61b1aeea77463d6a1684c3c89) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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 >>): #include "string-stream.h" ^~~~~~~~~~~~~~~~~ 1 error generated. # https://github.com/0day-ci/linux/commit/6aca0cd5a2ad0c09602bc75f28ae8d8fa... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Daniel-Latypov/kunit-introduce-class-mocking-support/20200919-023253 git checkout 6aca0cd5a2ad0c09602bc75f28ae8d8fac5a5166 vim +12 lib/kunit/debugfs.c e2219db280e3fe5 Alan Maguire 2020-03-26 11 e2219db280e3fe5 Alan Maguire 2020-03-26 @12 #include "string-stream.h" e2219db280e3fe5 Alan Maguire 2020-03-26 13 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org