Hi Jagdish, Thank you for the patch! Yet something to improve: [auto build test ERROR on driver-core/driver-core-testing] [also build test ERROR on linus/master linux/master v5.18-rc3] [cannot apply to hnaz-mm/master next-20220422] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Jagdish-Gediya/mm-demotion-Introduce-new-node-state-N_DEMOTION_TARGETS/20220423-035714 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git 4e224719f5d9b92abf1e0edfb2a83053208f3026 config: x86_64-randconfig-a016 (https://download.01.org/0day-ci/archive/20220423/202204231557.Jmw6QI8T-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5bd87350a5ae429baf8f373cb226a57b62f87280) 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 # https://github.com/intel-lab-lkp/linux/commit/0717e30f61ac83bd6ec65395bf46fdb5131cb83f git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Jagdish-Gediya/mm-demotion-Introduce-new-node-state-N_DEMOTION_TARGETS/20220423-035714 git checkout 0717e30f61ac83bd6ec65395bf46fdb5131cb83f # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> drivers/base/node.c:567:32: error: call to undeclared function 'node_get_demotion_targets'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] nodemask_t demotion_targets = node_get_demotion_targets(dev->id); ^ >> drivers/base/node.c:567:13: error: initializing 'nodemask_t' with an expression of incompatible type 'int' nodemask_t demotion_targets = node_get_demotion_targets(dev->id); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 errors generated. vim +/node_get_demotion_targets +567 drivers/base/node.c 563 564 static ssize_t demotion_targets_show(struct device *dev, 565 struct device_attribute *attr, char *buf) 566 { > 567 nodemask_t demotion_targets = node_get_demotion_targets(dev->id); 568 569 return sysfs_emit(buf, "%*pbl\n", nodemask_pr_args(&demotion_targets)); 570 } 571 static DEVICE_ATTR_RO(demotion_targets); 572 -- 0-DAY CI Kernel Test Service https://01.org/lkp