Hi Waiman, I love your patch! Perhaps something to improve: [auto build test WARNING on hnaz-mm/master] url: https://github.com/intel-lab-lkp/linux/commits/Waiman-Long/mm-sparsemem-Fix-mem_section-will-never-be-NULL-gcc-12-warning/20220331-050049 base: https://github.com/hnaz/linux-mm master config: arm-randconfig-c024-20220330 (https://download.01.org/0day-ci/archive/20220331/202203312327.XGeCiD5T-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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/2098f1d78cde338e81b3ba596ea39f37824e496e git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Waiman-Long/mm-sparsemem-Fix-mem_section-will-never-be-NULL-gcc-12-warning/20220331-050049 git checkout 2098f1d78cde338e81b3ba596ea39f37824e496e # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash security/keys/encrypted-keys/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/gfp.h:6, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:17, from security/keys/encrypted-keys/encrypted.c:15: security/keys/encrypted-keys/encrypted.c: In function 'derived_key_encrypt.constprop': >> include/linux/mmzone.h:1432:23: warning: array subscript 32 is outside array bounds of 'struct mem_section[32][1]' [-Warray-bounds] 1432 | unsigned long map = section->section_mem_map; | ^~~ include/linux/mmzone.h:1390:27: note: while referencing 'mem_section' 1390 | extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT]; | ^~~~~~~~~~~ vim +1432 include/linux/mmzone.h 29751f6991e845 Andy Whitcroft 2005-06-23 1429 29751f6991e845 Andy Whitcroft 2005-06-23 1430 static inline struct page *__section_mem_map_addr(struct mem_section *section) 29751f6991e845 Andy Whitcroft 2005-06-23 1431 { 29751f6991e845 Andy Whitcroft 2005-06-23 @1432 unsigned long map = section->section_mem_map; 29751f6991e845 Andy Whitcroft 2005-06-23 1433 map &= SECTION_MAP_MASK; 29751f6991e845 Andy Whitcroft 2005-06-23 1434 return (struct page *)map; 29751f6991e845 Andy Whitcroft 2005-06-23 1435 } 29751f6991e845 Andy Whitcroft 2005-06-23 1436 -- 0-DAY CI Kernel Test Service https://01.org/lkp
