tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4442749a203151a319a5bb8d0b983b84253a6931 commit: bd295a352cfa24e5110a53f978edb48b7c21ff8f [2890/4758] ACPI: HMAT: attach a device for each soft-reserved range config: x86_64-randconfig-a002-20200902 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 224d8153b53b16cf535ea1a55afdfe1ec5b1374f) 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 bd295a352cfa24e5110a53f978edb48b7c21ff8f # 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 >>): >> ld.lld: error: undefined symbol: phys_to_target_node >>> referenced by device.c:84 (drivers/dax/hmem/device.c:84) >>> dax/hmem/device.o:(hmem_register_one) in archive drivers/built-in.a --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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