Hi Ben, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on pm/linux-next] [also build test WARNING on linus/master linux/master v5.10-rc3 next-20201111] [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/Ben-Widawsky/CXL-2-0-Support/202... base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: ia64-allmodconfig (attached as .config) compiler: ia64-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/69b8720d497b9e7dfdd05e6a17f49ab41... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ben-Widawsky/CXL-2-0-Support/20201111-134547 git checkout 69b8720d497b9e7dfdd05e6a17f49ab41b6b681f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 10 | int cxl_register(struct device *dev) | ^~~~~~~~~~~~ vim +/cxl_register +10 drivers/cxl/bus.c 9 11 { 12 int rc; 13 14 dev->bus = &cxl_bus_type; 15 rc = device_add(dev); 16 if (rc) 17 put_device(dev); 18 return rc; 19 } 20 EXPORT_SYMBOL_GPL(cxl_register); 21 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org