Hi Sidhartha, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Sidhartha-Kumar/mm-filemap-change-index-to-PAGE_SIZE-for-hugetlb-pages/20230815-055236 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230814215035.222688-1-sidhartha.kumar%40oracle.com patch subject: [PATCH v4] mm/filemap: change ->index to PAGE_SIZE for hugetlb pages config: i386-randconfig-i005-20230815 (https://download.01.org/0day-ci/archive/20230815/202308151231.L2pfzOmu-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce: (https://download.01.org/0day-ci/archive/20230815/202308151231.L2pfzOmu-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308151231.L2pfzOmu-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/hugetlb.c:2116:9: warning: no previous prototype for function 'hugetlb_basepage_index' [-Wmissing-prototypes] pgoff_t hugetlb_basepage_index(struct page *page) ^ mm/hugetlb.c:2116:1: note: declare 'static' if the function is not intended to be used outside of this translation unit pgoff_t hugetlb_basepage_index(struct page *page) ^ static include/linux/types.h:137:17: note: expanded from macro 'pgoff_t' #define pgoff_t unsigned long ^ 1 warning generated. vim +/hugetlb_basepage_index +2116 mm/hugetlb.c c0d0381ade7988 Mike Kravetz 2020-04-01 2115 fe19bd3dae3d15 Hugh Dickins 2021-06-24 @2116 pgoff_t hugetlb_basepage_index(struct page *page) 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2117 { 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2118 struct page *page_head = compound_head(page); 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2119 pgoff_t index = page_index(page_head); 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2120 unsigned long compound_idx; 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2121 23baf831a32c04 Kirill A. Shutemov 2023-03-15 2122 if (compound_order(page_head) > MAX_ORDER) 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2123 compound_idx = page_to_pfn(page) - page_to_pfn(page_head); 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2124 else 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2125 compound_idx = page - page_head; 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2126 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2127 return (index << compound_order(page_head)) + compound_idx; 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2128 } 13d60f4b6ab5b7 Zhang Yi 2013-06-25 2129 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
