Hi Sukrit, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on akpm-mm/mm-nonmm-unstable linus/master v6.9 next-20240522] [cannot apply to vbabka-slab/for-next] [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/Sukrit-Bhatnagar/mm-printk-introduce-new-format-pGs-for-slab-flags/20240522-154443 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20240522074629.2420423-2-Sukrit.Bhatnagar%40sony.com patch subject: [PATCH 1/2] mm: printk: introduce new format %pGs for slab flags config: x86_64-randconfig-123-20240522 (https://download.01.org/0day-ci/archive/20240523/202405230441.A0LFA9SY-lkp@xxxxxxxxx/config) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240523/202405230441.A0LFA9SY-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/202405230441.A0LFA9SY-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> lib/test_printf.c:692:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long [addressable] [assigned] flags @@ got restricted slab_flags_t @@ lib/test_printf.c:692:15: sparse: expected unsigned long [addressable] [assigned] flags lib/test_printf.c:692:15: sparse: got restricted slab_flags_t lib/test_printf.c:708:49: sparse: sparse: cast from restricted gfp_t lib/test_printf.c:712:58: sparse: sparse: cast from restricted gfp_t lib/test_printf.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/umh.h, include/linux/kmod.h, ...): include/linux/page-flags.h:240:46: sparse: sparse: self-comparison always evaluates to false include/linux/page-flags.h:240:46: sparse: sparse: self-comparison always evaluates to false vim +692 lib/test_printf.c 656 657 static void __init 658 flags(void) 659 { 660 unsigned long flags; 661 char *cmp_buffer; 662 gfp_t gfp; 663 unsigned int page_type; 664 665 cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL); 666 if (!cmp_buffer) 667 return; 668 669 flags = 0; 670 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer); 671 672 flags = 1UL << NR_PAGEFLAGS; 673 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer); 674 675 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru 676 | 1UL << PG_active | 1UL << PG_swapbacked; 677 page_flags_test(1, 1, 1, 0x1fffff, 1, flags, 678 "uptodate|dirty|lru|active|swapbacked", 679 cmp_buffer); 680 681 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC; 682 test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags); 683 684 flags = 0; 685 scnprintf(cmp_buffer, BUF_SIZE, "%#x(%s)", (unsigned int) flags, ""); 686 test(cmp_buffer, "%pGs", &flags); 687 688 flags = 1U << _SLAB_FLAGS_LAST_BIT; 689 scnprintf(cmp_buffer, BUF_SIZE, "%#x(%s)", (unsigned int) flags, ""); 690 test(cmp_buffer, "%pGs", &flags); 691 > 692 flags = SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_NO_USER_FLAGS; 693 scnprintf(cmp_buffer, BUF_SIZE, "%#x(%s)", (unsigned int) flags, 694 "HWCACHE_ALIGN|PANIC|NO_USER_FLAGS"); 695 test(cmp_buffer, "%pGs", &flags); 696 697 gfp = GFP_TRANSHUGE; 698 test("GFP_TRANSHUGE", "%pGg", &gfp); 699 700 gfp = GFP_ATOMIC|__GFP_DMA; 701 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp); 702 703 gfp = __GFP_HIGH; 704 test("__GFP_HIGH", "%pGg", &gfp); 705 706 /* Any flags not translated by the table should remain numeric */ 707 gfp = ~__GFP_BITS_MASK; 708 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp); 709 test(cmp_buffer, "%pGg", &gfp); 710 711 snprintf(cmp_buffer, BUF_SIZE, "__GFP_HIGH|%#lx", 712 (unsigned long) gfp); 713 gfp |= __GFP_HIGH; 714 test(cmp_buffer, "%pGg", &gfp); 715 716 page_type = ~0; 717 page_type_test(page_type, "", cmp_buffer); 718 719 page_type = 10; 720 page_type_test(page_type, "", cmp_buffer); 721 722 page_type = ~PG_buddy; 723 page_type_test(page_type, "buddy", cmp_buffer); 724 725 page_type = ~(PG_table | PG_buddy); 726 page_type_test(page_type, "table|buddy", cmp_buffer); 727 728 kfree(cmp_buffer); 729 } 730 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
