Hi Daniel, Thank you for the patch! Yet something to improve: [auto build test ERROR on 754e0b0e35608ed5206d6a67a791563c631cec07] url: https://github.com/0day-ci/linux/commits/Daniel-Latypov/thunderbolt-test-... base: 754e0b0e35608ed5206d6a67a791563c631cec07 config: x86_64-randconfig-c004-20220214 (https://download.01.org/0day-ci/archive/20220215/202202150853.bduLrzVV-lk...) 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/cfd6f15bf8c210c9d90742af86b2bacc9... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Daniel-Latypov/thunderbolt-test-get-running-under-UML-add-kunitconfig/20220215-024255 git checkout cfd6f15bf8c210c9d90742af86b2bacc9577136e # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 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 >>): ld: drivers/thunderbolt/test.o: in function `kunit_test_suites_init': ld: drivers/thunderbolt/test.o: in function `kunit_test_suites_exit': vim +2728 drivers/thunderbolt/test.c 2727 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org