Hi Guixin, kernel test robot noticed the following build warnings: [auto build test WARNING on pci/next] [also build test WARNING on pci/for-linus linus/master v6.12-rc3 next-20241018] [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/Guixin-Liu/PCI-optimize-proc-sequential-file-read/20241018-135026 base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next patch link: https://lore.kernel.org/r/20241018054728.116519-1-kanie%40linux.alibaba.com patch subject: [PATCH] PCI: optimize proc sequential file read config: x86_64-randconfig-122-20241019 (https://download.01.org/0day-ci/archive/20241020/202410201436.9i93qAYF-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241020/202410201436.9i93qAYF-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/202410201436.9i93qAYF-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/pci/proc.c:22:1: sparse: sparse: symbol 'pci_seq_tree' was not declared. Should it be static? vim +/pci_seq_tree +22 drivers/pci/proc.c 21 > 22 DEFINE_XARRAY_FLAGS(pci_seq_tree, 0); 23 static unsigned long pci_max_idx; 24 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki