[kbuild-all] [linux-next:master 4438/4439] include/linux/mmzone.h:1431:23: warning: array subscript 32 is outside array bounds of 'struct mem_section[32][1]'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 554f92dbda161fa073844ae6c62db257b8860a0a commit: c052f4a3cbf1f171a3ceedd76b70d6acf2718d34 [4438/4439] Merge branch 'akpm-current/current' config: arm-randconfig-c002-20220208 (https://download.01.org/0day-ci/archive/20220209/202202090028.zSZDO5zf-lk...) 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout c052f4a3cbf1f171a3ceedd76b70d6acf2718d34 # 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 fs/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; 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 fs/direct-io.c:24: fs/direct-io.c: In function 'dio_zero_block': 1431 | unsigned long map = section->section_mem_map; | ^~~ include/linux/mmzone.h:1389:27: note: while referencing 'mem_section' 1389 | extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT]; | ^~~~~~~~~~~ fs/direct-io.c: In function 'do_direct_IO': 1431 | unsigned long map = section->section_mem_map; | ^~~ include/linux/mmzone.h:1389:27: note: while referencing 'mem_section' 1389 | extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT]; | ^~~~~~~~~~~ -- 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 fs/iomap/direct-io.c:6: fs/iomap/direct-io.c: In function 'iomap_dio_zero': 1431 | unsigned long map = section->section_mem_map; | ^~~ include/linux/mmzone.h:1389:27: note: while referencing 'mem_section' 1389 | extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT]; | ^~~~~~~~~~~ vim +1431 include/linux/mmzone.h 29751f6991e845 Andy Whitcroft 2005-06-23 1428 29751f6991e845 Andy Whitcroft 2005-06-23 1429 static inline struct page *__section_mem_map_addr(struct mem_section *section) 29751f6991e845 Andy Whitcroft 2005-06-23 1430 { 29751f6991e845 Andy Whitcroft 2005-06-23 @1431 unsigned long map = section->section_mem_map; 29751f6991e845 Andy Whitcroft 2005-06-23 1432 map &= SECTION_MAP_MASK; 29751f6991e845 Andy Whitcroft 2005-06-23 1433 return (struct page *)map; 29751f6991e845 Andy Whitcroft 2005-06-23 1434 } 29751f6991e845 Andy Whitcroft 2005-06-23 1435 :::::: The code at line 1431 was first introduced by commit :::::: 29751f6991e845f7d002a6ae520bf996b38c8dcd [PATCH] sparsemem hotplug base :::::: TO: Andy Whitcroft <apw(a)shadowen.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org