Hi Kairui, kernel test robot noticed the following build warnings: https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Kairui-Song/mm-swap-fix-a-potential-undefined-behavior-issue/20231120-035926 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20231119194740.94101-4-ryncsn%40gmail.com patch subject: [PATCH 03/24] mm/swap: move no readahead swapin code to a stand alone helper config: um-randconfig-r081-20231120 (https://download.01.org/0day-ci/archive/20231120/202311201135.iG2KLShW-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce: (https://download.01.org/0day-ci/archive/20231120/202311201135.iG2KLShW-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> | Reported-by: Dan Carpenter <error27@xxxxxxxxx> | Closes: https://lore.kernel.org/r/202311201135.iG2KLShW-lkp@xxxxxxxxx/ smatch warnings: mm/swap_state.c:881 swapin_no_readahead() warn: use 'gfp_mask' here instead of GFP_KERNEL? vim +/gfp_mask +881 mm/swap_state.c 19f582d2684e47 Kairui Song 2023-11-20 856 /** 19f582d2684e47 Kairui Song 2023-11-20 857 * swapin_no_readahead - swap in pages skipping swap cache and readahead 19f582d2684e47 Kairui Song 2023-11-20 858 * @entry: swap entry of this memory 19f582d2684e47 Kairui Song 2023-11-20 859 * @gfp_mask: memory allocation flags 19f582d2684e47 Kairui Song 2023-11-20 860 * @vmf: fault information 19f582d2684e47 Kairui Song 2023-11-20 861 * 19f582d2684e47 Kairui Song 2023-11-20 862 * Returns the struct page for entry and addr after the swap entry is read 19f582d2684e47 Kairui Song 2023-11-20 863 * in. 19f582d2684e47 Kairui Song 2023-11-20 864 */ 19f582d2684e47 Kairui Song 2023-11-20 865 struct page *swapin_no_readahead(swp_entry_t entry, gfp_t gfp_mask, 19f582d2684e47 Kairui Song 2023-11-20 866 struct vm_fault *vmf) 19f582d2684e47 Kairui Song 2023-11-20 867 { 19f582d2684e47 Kairui Song 2023-11-20 868 struct vm_area_struct *vma = vmf->vma; 19f582d2684e47 Kairui Song 2023-11-20 869 struct page *page = NULL; 19f582d2684e47 Kairui Song 2023-11-20 870 struct folio *folio; 19f582d2684e47 Kairui Song 2023-11-20 871 void *shadow = NULL; 19f582d2684e47 Kairui Song 2023-11-20 872 19f582d2684e47 Kairui Song 2023-11-20 873 folio = vma_alloc_folio(GFP_HIGHUSER_MOVABLE, 0, 19f582d2684e47 Kairui Song 2023-11-20 874 vma, vmf->address, false); 19f582d2684e47 Kairui Song 2023-11-20 875 if (folio) { 19f582d2684e47 Kairui Song 2023-11-20 876 __folio_set_locked(folio); 19f582d2684e47 Kairui Song 2023-11-20 877 __folio_set_swapbacked(folio); 19f582d2684e47 Kairui Song 2023-11-20 878 19f582d2684e47 Kairui Song 2023-11-20 879 if (mem_cgroup_swapin_charge_folio(folio, 19f582d2684e47 Kairui Song 2023-11-20 880 vma->vm_mm, GFP_KERNEL, s/GFP_KERNEL/gfp_mask/? 19f582d2684e47 Kairui Song 2023-11-20 @881 entry)) { 19f582d2684e47 Kairui Song 2023-11-20 882 folio_unlock(folio); 19f582d2684e47 Kairui Song 2023-11-20 883 folio_put(folio); 19f582d2684e47 Kairui Song 2023-11-20 884 return NULL; 19f582d2684e47 Kairui Song 2023-11-20 885 } 19f582d2684e47 Kairui Song 2023-11-20 886 mem_cgroup_swapin_uncharge_swap(entry); 19f582d2684e47 Kairui Song 2023-11-20 887 19f582d2684e47 Kairui Song 2023-11-20 888 shadow = get_shadow_from_swap_cache(entry); 19f582d2684e47 Kairui Song 2023-11-20 889 if (shadow) 19f582d2684e47 Kairui Song 2023-11-20 890 workingset_refault(folio, shadow); 19f582d2684e47 Kairui Song 2023-11-20 891 19f582d2684e47 Kairui Song 2023-11-20 892 folio_add_lru(folio); 19f582d2684e47 Kairui Song 2023-11-20 893 19f582d2684e47 Kairui Song 2023-11-20 894 /* To provide entry to swap_readpage() */ 19f582d2684e47 Kairui Song 2023-11-20 895 folio->swap = entry; 19f582d2684e47 Kairui Song 2023-11-20 896 page = &folio->page; 19f582d2684e47 Kairui Song 2023-11-20 897 swap_readpage(page, true, NULL); 19f582d2684e47 Kairui Song 2023-11-20 898 folio->private = NULL; 19f582d2684e47 Kairui Song 2023-11-20 899 } 19f582d2684e47 Kairui Song 2023-11-20 900 19f582d2684e47 Kairui Song 2023-11-20 901 return page; 19f582d2684e47 Kairui Song 2023-11-20 902 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
