Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/lvqian-nfschina-com/mm-page_alloc-c-Remove-function-return-value/20221229-152005 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20221229071730.174444-1-lvqian%40nfschina.com patch subject: [PATCH] mm/page_alloc.c: Remove function return value config: arm64-randconfig-r013-20221227 compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project f5700e7b69048de958172fb513b336564e7f8709) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/1c571b39eb01c99e7832e61ccf5ab5e23ddf75d8 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review lvqian-nfschina-com/mm-page_alloc-c-Remove-function-return-value/20221229-152005 git checkout 1c571b39eb01c99e7832e61ccf5ab5e23ddf75d8 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): >> mm/page_alloc.c:842:41: error: incompatible function pointer types initializing 'int (*)(char *)' with an expression of type 'void (char *)' [-Wincompatible-function-pointer-types] early_param("debug_guardpage_minorder", debug_guardpage_minorder_setup); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/init.h:341:25: note: expanded from macro 'early_param' __setup_param(str, fn, fn, 1) ^~ include/linux/init.h:324:32: note: expanded from macro '__setup_param' = { __setup_str_##unique_id, fn, early } ^~ 1 error generated. vim +842 mm/page_alloc.c 031bc5743f158b Joonsoo Kim 2014-12-12 830 1c571b39eb01c9 lvqian 2022-12-29 831 static void __init debug_guardpage_minorder_setup(char *buf) c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 832 { c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 833 unsigned long res; c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 834 c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 835 if (kstrtoul(buf, 10, &res) < 0 || res > MAX_ORDER / 2) { 1170532bb49f94 Joe Perches 2016-03-17 836 pr_err("Bad debug_guardpage_minorder value\n"); 1c571b39eb01c9 lvqian 2022-12-29 837 } else { c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 838 _debug_guardpage_minorder = res; 1170532bb49f94 Joe Perches 2016-03-17 839 pr_info("Setting debug_guardpage_minorder to %lu\n", res); 1c571b39eb01c9 lvqian 2022-12-29 840 } c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 841 } f1c1e9f7b5b3dd Joonsoo Kim 2016-10-07 @842 early_param("debug_guardpage_minorder", debug_guardpage_minorder_setup); c0a32fc5a2e470 Stanislaw Gruszka 2012-01-10 843 -- 0-DAY CI Kernel Test Service https://01.org/lkp