tree: git://github.com/davidhildenbrand/linux single_zone head: 176a3d535903312944f7489127f520c5494bc810 commit: 176a3d535903312944f7489127f520c5494bc810 [4/4] tmp config: x86_64-randconfig-s021-20220124 (https://download.01.org/0day-ci/archive/20220128/202201280621.HyzMsDkU-lkp@intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/davidhildenbrand/linux/commit/176a3d535903312944f7489127f520c5494bc810 git remote add davidhildenbrand git://github.com/davidhildenbrand/linux git fetch --no-tags davidhildenbrand single_zone git checkout 176a3d535903312944f7489127f520c5494bc810 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/base/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) >> drivers/base/memory.c:648:13: sparse: sparse: symbol 'early_node_zone_for_memory_block' was not declared. Should it be static? Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org