Hi David, kernel test robot noticed the following build errors: [auto build test ERROR on rafael-pm/linux-next] [also build test ERROR on robh/for-next linus/master rafael-pm/acpi-bus v6.8-rc2 next-20240130] [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/David-Dai/dt-bindings-cpufreq-add-virtual-cpufreq-device/20240127-084645 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next patch link: https://lore.kernel.org/r/20240127004321.1902477-3-davidai%40google.com patch subject: [PATCH v5 2/2] cpufreq: add virtual-cpufreq driver config: x86_64-randconfig-121-20240130 (https://download.01.org/0day-ci/archive/20240131/202401310804.bWt7Vf6o-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/20240131/202401310804.bWt7Vf6o-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/202401310804.bWt7Vf6o-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: topology_set_scale_freq_source >>> referenced by virtual-cpufreq.c:115 (drivers/cpufreq/virtual-cpufreq.c:115) >>> drivers/cpufreq/virtual-cpufreq.o:(virt_cpufreq_cpu_init) in archive vmlinux.a -- >> ld.lld: error: undefined symbol: topology_clear_scale_freq_source >>> referenced by virtual-cpufreq.c:128 (drivers/cpufreq/virtual-cpufreq.c:128) >>> drivers/cpufreq/virtual-cpufreq.o:(virt_cpufreq_cpu_exit) in archive vmlinux.a -- >> ld.lld: error: undefined symbol: arch_freq_scale >>> referenced by virtual-cpufreq.c:38 (drivers/cpufreq/virtual-cpufreq.c:38) >>> drivers/cpufreq/virtual-cpufreq.o:(virt_scale_freq_tick) in archive vmlinux.a -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki