Hi Muchun, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20220901] [cannot apply to akpm-mm/mm-everything driver-core/driver-core-testing linus/master v6.0-rc4 v6.0-rc3 v6.0-rc2 v6.0-rc4] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Muchun-Song/mm-hugetlb-eliminate-memory-less-nodes-handling/20220906-114538 base: e47eb90a0a9ae20b82635b9b99a8d0979b757ad8 config: arm-randconfig-r023-20220906 (https://download.01.org/0day-ci/archive/20220906/202209062036.1eQ3lYsX-lkp@xxxxxxxxx/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c55b41d5199d2394dd6cdb8f52180d8b81d809d4) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/intel-lab-lkp/linux/commit/ec1575c86ce4904a7134d2fef8e231ecd50ffc75 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Muchun-Song/mm-hugetlb-eliminate-memory-less-nodes-handling/20220906-114538 git checkout ec1575c86ce4904a7134d2fef8e231ecd50ffc75 # 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=arm SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from mm/folio-compat.c:7: In file included from include/linux/migrate.h:8: >> include/linux/hugetlb.h:1150:49: warning: declaration of 'struct node' will not be visible outside of this function [-Wvisibility] static inline void hugetlb_register_node(struct node *node) ^ include/linux/hugetlb.h:1154:51: warning: declaration of 'struct node' will not be visible outside of this function [-Wvisibility] static inline void hugetlb_unregister_node(struct node *node) ^ 2 warnings generated. vim +1150 include/linux/hugetlb.h 1149 > 1150 static inline void hugetlb_register_node(struct node *node) 1151 { 1152 } 1153 -- 0-DAY CI Kernel Test Service https://01.org/lkp