Hi Baolin, First bad commit (maybe != root cause): tree: https://android.googlesource.com/kernel/goldfish android-5.4 head: 3ebeb5687243e405fbf34032249cada998ee4779 commit: 3ebeb5687243e405fbf34032249cada998ee4779 [1/1] FROMGIT: power: supply: Allow charger manager can be built as a module config: x86_64-randconfig-a001-20200810 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 3a34228bff6fdf45b50cb57cf5fb85d659eeb672) 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 3ebeb5687243e405fbf34032249cada998ee4779 # 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 errors (new ones prefixed by >>): ERROR: "__memcat_p" [drivers/hwtracing/stm/stm_core.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org