Hi Ricardo, Thank you for the patch! Yet something to improve: [auto build test ERROR on tip/x86/core] [also build test ERROR on tip/master driver-core/driver-core-testing linus/master v5.9-rc7 next-20201002] [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] url: https://github.com/0day-ci/linux/commits/Ricardo-Neri/drivers-core-Introduce-CPU-type-sysfs-interface/20201003-091754 base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 238c91115cd05c71447ea071624a4c9fe661f970 config: x86_64-randconfig-a012-20201002 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bcd05599d0e53977a963799d6ee4f6e0bc21331b) 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 # https://github.com/0day-ci/linux/commit/6e37c052cde780c58a9dd815e667d89538e30579 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ricardo-Neri/drivers-core-Introduce-CPU-type-sysfs-interface/20201003-091754 git checkout 6e37c052cde780c58a9dd815e667d89538e30579 # 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 All errors (new ones prefixed by >>): >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' return boot_cpu_has(X86_FEATURE_HYBRID_CPU); ^ >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' >> arch/x86/kernel/cpu/topology.c:169:22: error: use of undeclared identifier 'X86_FEATURE_HYBRID_CPU' fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated. vim +/X86_FEATURE_HYBRID_CPU +169 arch/x86/kernel/cpu/topology.c 166 167 bool arch_has_cpu_type(void) 168 { > 169 return boot_cpu_has(X86_FEATURE_HYBRID_CPU); 170 } 171 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org