[kbuild-all] [nvdimm:libnvdimm-pending 4/22] drivers/dax/hmem/device.c:7:6: warning: no previous prototype for 'hmem_register_device'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git libnvdimm-pending head: 17c5211450a8fb964757f9f51cae1dc9f973e5ee commit: 084a33058b0518760f04823e55fa17fd813f51fc [4/22] ACPI: HMAT: Refactor hmat_register_target_device to hmem_register_device config: arm64-allyesconfig (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 084a33058b0518760f04823e55fa17fd813f51fc # 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 warnings (new ones prefixed by >>): 7 | void hmem_register_device(int target_nid, struct resource *r) | ^~~~~~~~~~~~~~~~~~~~ vim +/hmem_register_device +7 drivers/dax/hmem/device.c 6 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org