tree: https://git.gitlab.arm.com/linux-arm/linux-iv.git topic/v1_acpi_cpu_capacity head: eece74e8aaac3da75e29d0d24730d90c85c7b0ea commit: eece74e8aaac3da75e29d0d24730d90c85c7b0ea [2/2] arch_topology: obtain cpu capacity using information from CPPC config: x86_64-randconfig-r013-20210512 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a0fed635fe1701470062495a6ffee1c608f3f1bc) 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 remote add linux-iv https://git.gitlab.arm.com/linux-arm/linux-iv.git git fetch --no-tags linux-iv topic/v1_acpi_cpu_capacity git checkout eece74e8aaac3da75e29d0d24730d90c85c7b0ea # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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 arch/x86/kernel/asm-offsets.c:9: In file included from include/linux/crypto.h:20: In file included from include/linux/slab.h:15: In file included from include/linux/gfp.h:9: In file included from include/linux/topology.h:36: #define arch_init_invariance_cppc init_freq_invariance_cppc ^ include/linux/arch_topology.h:16:9: note: previous definition is here #define arch_init_invariance_cppc init_cpu_capacity_cppc ^ 1 warning generated. -- In file included from kernel/time/hrtimer.c:25: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: In file included from include/linux/device.h:16: In file included from include/linux/energy_model.h:7: In file included from include/linux/kobject.h:20: In file included from include/linux/sysfs.h:16: In file included from include/linux/kernfs.h:13: In file included from include/linux/idr.h:15: In file included from include/linux/radix-tree.h:19: In file included from include/linux/xarray.h:14: In file included from include/linux/gfp.h:9: In file included from include/linux/topology.h:36: #define arch_init_invariance_cppc init_freq_invariance_cppc ^ include/linux/arch_topology.h:16:9: note: previous definition is here #define arch_init_invariance_cppc init_cpu_capacity_cppc ^ kernel/time/hrtimer.c:120:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [CLOCK_REALTIME] = HRTIMER_BASE_REALTIME, ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:121:22: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC, ^~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:122:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME, ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:123:17: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [CLOCK_TAI] = HRTIMER_BASE_TAI, ^~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:147:20: warning: unused function 'is_migration_base' [-Wunused-function] static inline bool is_migration_base(struct hrtimer_clock_base *base) ^ 6 warnings generated. -- In file included from arch/x86/kernel/asm-offsets.c:9: In file included from include/linux/crypto.h:20: In file included from include/linux/slab.h:15: In file included from include/linux/gfp.h:9: In file included from include/linux/topology.h:36: #define arch_init_invariance_cppc init_freq_invariance_cppc ^ include/linux/arch_topology.h:16:9: note: previous definition is here #define arch_init_invariance_cppc init_cpu_capacity_cppc ^ 1 warning generated. vim +/arch_init_invariance_cppc +223 arch/x86/include/asm/topology.h 1567c3e3467cdd Giovanni Gherdovich 2020-01-22 220 41ea667227bad5 Nathan Fontenot 2020-11-12 221 #ifdef CONFIG_ACPI_CPPC_LIB 41ea667227bad5 Nathan Fontenot 2020-11-12 222 void init_freq_invariance_cppc(void); 3efe78be8d652a Ionela Voinescu 2021-03-18 @223 #define arch_init_invariance_cppc init_freq_invariance_cppc 41ea667227bad5 Nathan Fontenot 2020-11-12 224 #endif 41ea667227bad5 Nathan Fontenot 2020-11-12 225 :::::: The code at line 223 was first introduced by commit :::::: 3efe78be8d652a157bd19b6dbd371a2762f953d2 x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc :::::: TO: Ionela Voinescu <ionela.voinescu(a)arm.com&gt; :::::: CC: Ionela Voinescu <ionela.voinescu(a)arm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org