Hi Alexey, Thank you for the patch! Yet something to improve: [auto build test ERROR on d58071a8a76d779eedab38033ae4c821c30295a5] url: https://github.com/0day-ci/linux/commits/Alexey-Avramov/mm-vmscan-add-sysctl-knobs-for-protecting-the-working-set/20211130-191905 base: d58071a8a76d779eedab38033ae4c821c30295a5 config: hexagon-randconfig-r045-20211129 (https://download.01.org/0day-ci/archive/20211201/202112010030.e6d9vIAL-lkp@intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 25eb7fa01d7ebbe67648ea03841cda55b4239ab2) 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/0day-ci/linux/commit/54324d9a29319c86d63a3bb17d401c90f547f9c1 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexey-Avramov/mm-vmscan-add-sysctl-knobs-for-protecting-the-working-set/20211130-191905 git checkout 54324d9a29319c86d63a3bb17d401c90f547f9c1 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> mm/vmscan.c:183:54: error: use of undeclared identifier 'CONFIG_ANON_MIN_KBYTES' unsigned long sysctl_anon_min_kbytes __read_mostly = CONFIG_ANON_MIN_KBYTES; ^ >> mm/vmscan.c:184:55: error: use of undeclared identifier 'CONFIG_CLEAN_LOW_KBYTES' unsigned long sysctl_clean_low_kbytes __read_mostly = CONFIG_CLEAN_LOW_KBYTES; ^ >> mm/vmscan.c:185:55: error: use of undeclared identifier 'CONFIG_CLEAN_MIN_KBYTES' unsigned long sysctl_clean_min_kbytes __read_mostly = CONFIG_CLEAN_MIN_KBYTES; ^ 3 errors generated. vim +/CONFIG_ANON_MIN_KBYTES +183 mm/vmscan.c 182 > 183 unsigned long sysctl_anon_min_kbytes __read_mostly = CONFIG_ANON_MIN_KBYTES; > 184 unsigned long sysctl_clean_low_kbytes __read_mostly = CONFIG_CLEAN_LOW_KBYTES; > 185 unsigned long sysctl_clean_min_kbytes __read_mostly = CONFIG_CLEAN_MIN_KBYTES; 186 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org