tree: https://github.com/curro/linux intel_pstate-vlp-v3 head: 320f232d1770592e468b87a378dc08ede8f654dc commit: 38a4edd698dc7ea425825088702686ee52294192 [7/16] cpufreq: intel_pstate: Implement VLP controller statistics and target range calculation. config: x86_64-randconfig-r021-20200914 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2c32c90bab09a6e2c1f370429db26017a182143) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 38a4edd698dc7ea425825088702686ee52294192 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/cpufreq/intel_pstate.c:37: In file included from drivers/cpufreq/../../kernel/sched/sched.h:70: #define ACPI_PROBE_TABLE(name) \ ^ include/linux/acpi.h:1177:9: note: previous definition is here #define ACPI_PROBE_TABLE(name) __##name##_acpi_probe_table ^ drivers/cpufreq/intel_pstate.c:90:23: warning: unused function 'percent_fp' [-Wunused-function] static inline int32_t percent_fp(int percent) ^ drivers/cpufreq/intel_pstate.c:105:23: warning: unused function 'percent_ext_fp' [-Wunused-function] static inline int32_t percent_ext_fp(int percent) ^ drivers/cpufreq/intel_pstate.c:2041:13: warning: unused function 'intel_pstate_reset_vlp' [-Wunused-function] static void intel_pstate_reset_vlp(struct cpudata *cpu) ^ drivers/cpufreq/intel_pstate.c:2190:39: warning: unused function 'get_vlp_target_range' [-Wunused-function] static const struct vlp_target_range *get_vlp_target_range(struct cpudata *cpu) ^ drivers/cpufreq/intel_pstate.c:2314:13: warning: unused function 'update_vlp_sample' [-Wunused-function] static bool update_vlp_sample(struct cpudata *cpu, u64 time, unsigned int flags) ^ 6 warnings generated. # https://github.com/curro/linux/commit/38a4edd698dc7ea425825088702686ee522... git remote add curro https://github.com/curro/linux git fetch --no-tags curro intel_pstate-vlp-v3 git checkout 38a4edd698dc7ea425825088702686ee52294192 vim +/ACPI_PROBE_TABLE +299 include/asm-generic/vmlinux.lds.h 6c3ff8b11a16ec Stephen Boyd 2013-10-30 297 e647b532275bb3 Marc Zyngier 2015-09-28 298 #ifdef CONFIG_ACPI e647b532275bb3 Marc Zyngier 2015-09-28 @299 #define ACPI_PROBE_TABLE(name) \ e647b532275bb3 Marc Zyngier 2015-09-28 300 . = ALIGN(8); \ a6214385005333 Masahiro Yamada 2018-05-09 301 __##name##_acpi_probe_table = .; \ 4b89b7f7aad574 Nicholas Piggin 2016-11-24 302 KEEP(*(__##name##_acpi_probe_table)) \ a6214385005333 Masahiro Yamada 2018-05-09 303 __##name##_acpi_probe_table_end = .; e647b532275bb3 Marc Zyngier 2015-09-28 304 #else e647b532275bb3 Marc Zyngier 2015-09-28 305 #define ACPI_PROBE_TABLE(name) e647b532275bb3 Marc Zyngier 2015-09-28 306 #endif e647b532275bb3 Marc Zyngier 2015-09-28 307 :::::: The code at line 299 was first introduced by commit :::::: e647b532275bb357e87272e052fccf5fcdb36a17 ACPI: Add early device probing infrastructure :::::: TO: Marc Zyngier <Marc.Zyngier(a)arm.com&gt; :::::: CC: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org