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charset=us-ascii Content-Disposition: inline In-Reply-To: <20250418162727.1535335-1-lrh2000@pku.edu.cn> Hi Ruihan, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Ruihan-Li/mm-mm_init-Don-t-iterate-pages-below-ARCH_PFN_OFFSET/20250419-002910 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20250418162727.1535335-1-lrh2000%40pku.edu.cn patch subject: [PATCH] mm/mm_init: Don't iterate pages below ARCH_PFN_OFFSET config: s390-randconfig-001-20250419 (https://download.01.org/0day-ci/archive/20250419/202504191834.zUYILN1L-lkp@intel.com/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250419/202504191834.zUYILN1L-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202504191834.zUYILN1L-lkp@intel.com/ All errors (new ones prefixed by >>): >> mm/mm_init.c:975:27: error: use of undeclared identifier 'ARCH_PFN_OFFSET' 975 | unsigned long hole_pfn = ARCH_PFN_OFFSET; | ^ 1 error generated. vim +/ARCH_PFN_OFFSET +975 mm/mm_init.c 971 972 static void __init memmap_init(void) 973 { 974 unsigned long start_pfn, end_pfn; > 975 unsigned long hole_pfn = ARCH_PFN_OFFSET; 976 int i, j, zone_id = 0, nid; 977 978 for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) { 979 struct pglist_data *node = NODE_DATA(nid); 980 981 for (j = 0; j < MAX_NR_ZONES; j++) { 982 struct zone *zone = node->node_zones + j; 983 984 if (!populated_zone(zone)) 985 continue; 986 987 memmap_init_zone_range(zone, start_pfn, end_pfn, 988 &hole_pfn); 989 zone_id = j; 990 } 991 } 992 993 /* 994 * Initialize the memory map for hole in the range [memory_end, 995 * section_end] for SPARSEMEM and in the range [memory_end, memmap_end] 996 * for FLATMEM. 997 * Append the pages in this hole to the highest zone in the last 998 * node. 999 */ 1000 #ifdef CONFIG_SPARSEMEM 1001 end_pfn = round_up(end_pfn, PAGES_PER_SECTION); 1002 #else 1003 end_pfn = round_up(end_pfn, MAX_ORDER_NR_PAGES); 1004 #endif 1005 if (hole_pfn < end_pfn) 1006 init_unavailable_range(hole_pfn, end_pfn, zone_id, nid); 1007 } 1008 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki