Hi Denis, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on kselftest/next] [also build test ERROR on linux/master linus/master v5.14-rc6 next-20210818] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Denis-Efremov/selftests-floppy-b... base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next config: x86_64-randconfig-c022-20210818 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/9794c683e44ce85ae80f3d3b018466d3b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Denis-Efremov/selftests-floppy-basic-tests/20210818-235242 git checkout 9794c683e44ce85ae80f3d3b018466d3bc1b5807 # save the attached .config to linux build tree make W=1 ARCH=x86_64 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 >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org