[kbuild-all] [linux-next:master 3093/3958] drivers/acpi/numa/hmat.c:658: undefined reference to `hmem_register_device'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b36c969764ab12faebb74711c942fa3e6eaf1e96 commit: f7782cc946fea99b8a4a0a83b6c3775a6beff8ce [3093/3958] ACPI: HMAT: refactor hmat_register_target_device to hmem_register_device config: arm64-randconfig-r016-20200831 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 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 git checkout f7782cc946fea99b8a4a0a83b6c3775a6beff8ce # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 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 >>): aarch64-linux-ld: drivers/acpi/numa/hmat.o: in function `hmat_register_target_devices': # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout f7782cc946fea99b8a4a0a83b6c3775a6beff8ce vim +658 drivers/acpi/numa/hmat.c 643 644 static void hmat_register_target_devices(struct memory_target *target) 645 { 646 struct resource *res; 647 648 /* 649 * Do not bother creating devices if no driver is available to 650 * consume them. 651 */ 652 if (!IS_ENABLED(CONFIG_DEV_DAX_HMEM)) 653 return; 654 655 for (res = target->memregions.child; res; res = res->sibling) { 656 int target_nid = acpi_map_pxm_to_node(target->memory_pxm); 657 659 } 660 } 661 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org