Hi Huang, kernel test robot noticed the following build errors: [auto build test ERROR on driver-core/driver-core-testing] [also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus linus/master v6.8-rc1 next-20240125] [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/Huang-Shijie/init-refactor-the-generic-cpu_to_node-for-NUMA/20240118-111802 base: driver-core/driver-core-testing patch link: https://lore.kernel.org/r/20240118031412.3300-1-shijie%40os.amperecomputing.com patch subject: [PATCH] init: refactor the generic cpu_to_node for NUMA config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20240129/202401290116.GpUOCzGd-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240129/202401290116.GpUOCzGd-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/202401290116.GpUOCzGd-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: cpu_to_node >>> referenced by main.c:880 (init/main.c:880) >>> init/main.o:(start_kernel) in archive vmlinux.a >>> referenced by main.c:1542 (init/main.c:1542) >>> init/main.o:(kernel_init_freeable) in archive vmlinux.a >>> referenced by core.c:550 (arch/x86/events/amd/core.c:550) >>> arch/x86/events/amd/core.o:(amd_pmu_cpu_prepare) in archive vmlinux.a >>> referenced 179 more times -- >> ld.lld: error: undefined symbol: _cpu_to_node >>> referenced by main.c:1542 (init/main.c:1542) >>> init/main.o:(kernel_init_freeable) in archive vmlinux.a -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki