tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: b7cbaf59f62f8ab8f157698f9e31642bff525bd0 commit: a035b6bf863e5c42c2746de2a8ed6600140307e7 mm/memory_hotplug: introduce default phys_to_target_node() implementation date: 3 weeks ago config: x86_64-randconfig-r014-20201103 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1fcd5d5655e29f85e12b402e32974f207cfedf32) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a035b6bf863e5c42c2746de2a8ed6600140307e7 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout a035b6bf863e5c42c2746de2a8ed6600140307e7 # 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@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "phys_to_target_node" [drivers/nvdimm/nd_e820.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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