Hi Baolin, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on next-20241108] [cannot apply to linus/master v6.12-rc6] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Baolin-Wang/mm-factor-out-the-order-calculation-into-a-new-helper/20241108-121545 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/e2f4e483f75e54be0654fafb2147822faacac16d.1731038280.git.baolin.wang%40linux.alibaba.com patch subject: [PATCH 3/4] mm: shmem: add large folio support for tmpfs config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20241108/202411081926.LQ3wEK7l-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241108/202411081926.LQ3wEK7l-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/202411081926.LQ3wEK7l-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/shmem.c:567: warning: Function parameter or struct member 'write_end' not described in 'shmem_mapping_size_orders' >> mm/shmem.c:567: warning: Excess function parameter 'size' description in 'shmem_mapping_size_orders' vim +567 mm/shmem.c 551 552 /** 553 * shmem_mapping_size_orders - Get allowable folio orders for the given file size. 554 * @mapping: Target address_space. 555 * @index: The page index. 556 * @size: The suggested size of the folio to create. 557 * 558 * This returns a high order for folios (when supported) based on the file size 559 * which the mapping currently allows at the given index. The index is relevant 560 * due to alignment considerations the mapping might have. The returned order 561 * may be less than the size passed. 562 * 563 * Return: The orders. 564 */ 565 static inline unsigned int 566 shmem_mapping_size_orders(struct address_space *mapping, pgoff_t index, loff_t write_end) > 567 { 568 unsigned int order; 569 size_t size; 570 571 if (!mapping_large_folio_support(mapping) || !write_end) 572 return 0; 573 574 /* Calculate the write size based on the write_end */ 575 size = write_end - (index << PAGE_SHIFT); 576 order = filemap_get_order(size); 577 if (!order) 578 return 0; 579 580 /* If we're not aligned, allocate a smaller folio */ 581 if (index & ((1UL << order) - 1)) 582 order = __ffs(index); 583 584 order = min_t(size_t, order, MAX_PAGECACHE_ORDER); 585 return order > 0 ? BIT(order + 1) - 1 : 0; 586 } 587 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
