Hi Wupeng, Thank you for the patch! Yet something to improve: [auto build test ERROR on next-20220818] url: https://github.com/intel-lab-lkp/linux/commits/Wupeng-Ma/watermark-related-improvement-on-zone-movable/20220818-170659 base: 5b6a4bf680d61b1dd26629840f848d0df8983c62 config: s390-randconfig-r011-20220818 (https://download.01.org/0day-ci/archive/20220818/202208181955.CIEgocmg-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 12.1.0 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 # https://github.com/intel-lab-lkp/linux/commit/d126658752d146244ef366f63b8edbb797dc5436 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Wupeng-Ma/watermark-related-improvement-on-zone-movable/20220818-170659 git checkout d126658752d146244ef366f63b8edbb797dc5436 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): s390-linux-ld: mm/page_alloc.o: in function `watermark_scale_factor_sysctl_handler': page_alloc.c:(.text+0xbaa2): undefined reference to `sysctl_vals' >> s390-linux-ld: page_alloc.c:(.text+0xbaae): undefined reference to `sysctl_vals' -- 0-DAY CI Kernel Test Service https://01.org/lkp
