Hi Lizhi, kernel test robot noticed the following build warnings: [auto build test WARNING on pci/next] [also build test WARNING on pci/for-linus robh/for-next linus/master v6.5-rc6 next-20230809] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Lizhi-Hou/of-dynamic-Add-interfaces-for-creating-device-node-dynamically/20230729-010934 base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next patch link: https://lore.kernel.org/r/1690564018-11142-6-git-send-email-lizhi.hou%40amd.com patch subject: [PATCH V12 5/5] of: unittest: Add pci_dt_testdrv pci driver config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20230815/202308150643.iteeGiQb-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce: (https://download.01.org/0day-ci/archive/20230815/202308150643.iteeGiQb-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308150643.iteeGiQb-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/of/unittest.c:3737:5: sparse: sparse: symbol 'of_unittest_pci_dev_num' was not declared. Should it be static? >> drivers/of/unittest.c:3738:5: sparse: sparse: symbol 'of_unittest_pci_child_num' was not declared. Should it be static? vim +/of_unittest_pci_dev_num +3737 drivers/of/unittest.c 3736 > 3737 int of_unittest_pci_dev_num; > 3738 int of_unittest_pci_child_num; 3739 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki