Hi Mike, Thank you for the patch! Yet something to improve: [auto build test ERROR on 51551d71edbc998fd8c8afa7312db3d270f5998e] url: https://github.com/intel-lab-lkp/linux/commits/Mike-Rapoport/arm-reword-ARCH_FORCE_MAX_ORDER-prompt-and-help-text/20230323-172512 base: 51551d71edbc998fd8c8afa7312db3d270f5998e patch link: https://lore.kernel.org/r/20230323092156.2545741-3-rppt%40kernel.org patch subject: [PATCH 02/14] arm64: drop ranges in definition of ARCH_FORCE_MAX_ORDER config: arm64-randconfig-r031-20230322 (https://download.01.org/0day-ci/archive/20230324/202303240155.01y6T6Fj-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/0522f943c071abf1610651ea40405b7489c50987 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Mike-Rapoport/arm-reword-ARCH_FORCE_MAX_ORDER-prompt-and-help-text/20230323-172512 git checkout 0522f943c071abf1610651ea40405b7489c50987 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/iommu/ kernel/dma/ mm/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202303240155.01y6T6Fj-lkp@xxxxxxxxx/ All error/warnings (new ones prefixed by >>): >> mm/memory.c:5791:37: warning: shift count is negative [-Wshift-count-negative] if (unlikely(pages_per_huge_page > MAX_ORDER_NR_PAGES)) { ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/compiler.h:48:41: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:33:34: note: expanded from macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ >> mm/memory.c:5791:37: warning: shift count is negative [-Wshift-count-negative] if (unlikely(pages_per_huge_page > MAX_ORDER_NR_PAGES)) { ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/compiler.h:48:68: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:35:19: note: expanded from macro '__branch_check__' expect, is_constant); \ ^~~~~~~~~~~ mm/memory.c:5843:37: warning: shift count is negative [-Wshift-count-negative] if (unlikely(pages_per_huge_page > MAX_ORDER_NR_PAGES)) { ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/compiler.h:48:41: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:33:34: note: expanded from macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ mm/memory.c:5843:37: warning: shift count is negative [-Wshift-count-negative] if (unlikely(pages_per_huge_page > MAX_ORDER_NR_PAGES)) { ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/compiler.h:48:68: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:35:19: note: expanded from macro '__branch_check__' expect, is_constant); \ ^~~~~~~~~~~ 4 warnings generated. -- >> drivers/iommu/dma-iommu.c:739:16: error: anonymous bit-field has negative width (-1) order_mask &= GENMASK(MAX_ORDER, 0); ^ include/linux/bits.h:37:3: note: expanded from macro 'GENMASK' (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) ^ include/linux/bits.h:23:3: note: expanded from macro 'GENMASK_INPUT_CHECK' (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \ ^ include/linux/build_bug.h:16:53: note: expanded from macro 'BUILD_BUG_ON_ZERO' #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) ^ >> drivers/iommu/dma-iommu.c:739:16: warning: shift count >= width of type [-Wshift-count-overflow] order_mask &= GENMASK(MAX_ORDER, 0); ^~~~~~~~~~~~~~~~~~~~~ include/linux/bits.h:37:31: note: expanded from macro 'GENMASK' (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) ^~~~~~~~~~~~~~~ include/linux/bits.h:35:11: note: expanded from macro '__GENMASK' (~UL(0) >> (BITS_PER_LONG - 1 - (h)))) ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning and 1 error generated. -- >> kernel/dma/pool.c:197:39: warning: shift count is negative [-Wshift-count-negative] pages = min_t(unsigned long, pages, MAX_ORDER_NR_PAGES); ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/minmax.h:126:59: note: expanded from macro 'min_t' #define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <) ^ include/linux/minmax.h:37:12: note: expanded from macro '__careful_cmp' __cmp(x, y, op), \ ^ include/linux/minmax.h:28:34: note: expanded from macro '__cmp' #define __cmp(x, y, op) ((x) op (y) ? (x) : (y)) ^ >> kernel/dma/pool.c:197:39: warning: shift count is negative [-Wshift-count-negative] pages = min_t(unsigned long, pages, MAX_ORDER_NR_PAGES); ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/minmax.h:126:59: note: expanded from macro 'min_t' #define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <) ^ include/linux/minmax.h:37:12: note: expanded from macro '__careful_cmp' __cmp(x, y, op), \ ^ include/linux/minmax.h:28:46: note: expanded from macro '__cmp' #define __cmp(x, y, op) ((x) op (y) ? (x) : (y)) ^ >> kernel/dma/pool.c:197:39: warning: shift count is negative [-Wshift-count-negative] pages = min_t(unsigned long, pages, MAX_ORDER_NR_PAGES); ^~~~~~~~~~~~~~~~~~ include/linux/mmzone.h:33:31: note: expanded from macro 'MAX_ORDER_NR_PAGES' #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER) ^ ~~~~~~~~~ include/linux/minmax.h:126:59: note: expanded from macro 'min_t' #define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <) ^ include/linux/minmax.h:38:17: note: expanded from macro '__careful_cmp' __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op)) ^ include/linux/minmax.h:32:25: note: expanded from macro '__cmp_once' typeof(y) unique_y = (y); \ ^ 3 warnings generated. vim +739 drivers/iommu/dma-iommu.c 0db2e5d18f76a6 Robin Murphy 2015-10-01 732 c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 733 static struct page **__iommu_dma_alloc_pages(struct device *dev, c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 734 unsigned int count, unsigned long order_mask, gfp_t gfp) 0db2e5d18f76a6 Robin Murphy 2015-10-01 735 { 0db2e5d18f76a6 Robin Murphy 2015-10-01 736 struct page **pages; c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 737 unsigned int i = 0, nid = dev_to_node(dev); 3b6b7e19e31a81 Robin Murphy 2016-04-13 738 98d56389a5e38b Kirill A. Shutemov 2023-03-15 @739 order_mask &= GENMASK(MAX_ORDER, 0); 3b6b7e19e31a81 Robin Murphy 2016-04-13 740 if (!order_mask) 3b6b7e19e31a81 Robin Murphy 2016-04-13 741 return NULL; 0db2e5d18f76a6 Robin Murphy 2015-10-01 742 ab6f4b001c8c72 Gustavo A. R. Silva 2021-09-28 743 pages = kvcalloc(count, sizeof(*pages), GFP_KERNEL); 0db2e5d18f76a6 Robin Murphy 2015-10-01 744 if (!pages) 0db2e5d18f76a6 Robin Murphy 2015-10-01 745 return NULL; 0db2e5d18f76a6 Robin Murphy 2015-10-01 746 0db2e5d18f76a6 Robin Murphy 2015-10-01 747 /* IOMMU can map any pages, so himem can also be used here */ 0db2e5d18f76a6 Robin Murphy 2015-10-01 748 gfp |= __GFP_NOWARN | __GFP_HIGHMEM; 0db2e5d18f76a6 Robin Murphy 2015-10-01 749 0db2e5d18f76a6 Robin Murphy 2015-10-01 750 while (count) { 0db2e5d18f76a6 Robin Murphy 2015-10-01 751 struct page *page = NULL; 3b6b7e19e31a81 Robin Murphy 2016-04-13 752 unsigned int order_size; 0db2e5d18f76a6 Robin Murphy 2015-10-01 753 0db2e5d18f76a6 Robin Murphy 2015-10-01 754 /* 0db2e5d18f76a6 Robin Murphy 2015-10-01 755 * Higher-order allocations are a convenience rather 0db2e5d18f76a6 Robin Murphy 2015-10-01 756 * than a necessity, hence using __GFP_NORETRY until 3b6b7e19e31a81 Robin Murphy 2016-04-13 757 * falling back to minimum-order allocations. 0db2e5d18f76a6 Robin Murphy 2015-10-01 758 */ a706e6e10225fb Kirill A. Shutemov 2023-03-15 759 for (order_mask &= GENMASK(__fls(count), 0); 3b6b7e19e31a81 Robin Murphy 2016-04-13 760 order_mask; order_mask &= ~order_size) { 3b6b7e19e31a81 Robin Murphy 2016-04-13 761 unsigned int order = __fls(order_mask); c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 762 gfp_t alloc_flags = gfp; 3b6b7e19e31a81 Robin Murphy 2016-04-13 763 3b6b7e19e31a81 Robin Murphy 2016-04-13 764 order_size = 1U << order; c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 765 if (order_mask > order_size) c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 766 alloc_flags |= __GFP_NORETRY; c4b17afb0a4e8d Ganapatrao Kulkarni 2018-11-30 767 page = alloc_pages_node(nid, alloc_flags, order); 0db2e5d18f76a6 Robin Murphy 2015-10-01 768 if (!page) 0db2e5d18f76a6 Robin Murphy 2015-10-01 769 continue; 4604393ca0c6e4 Robin Murphy 2020-09-03 770 if (order) 0db2e5d18f76a6 Robin Murphy 2015-10-01 771 split_page(page, order); 0db2e5d18f76a6 Robin Murphy 2015-10-01 772 break; 0db2e5d18f76a6 Robin Murphy 2015-10-01 773 } 0db2e5d18f76a6 Robin Murphy 2015-10-01 774 if (!page) { 0db2e5d18f76a6 Robin Murphy 2015-10-01 775 __iommu_dma_free_pages(pages, i); 0db2e5d18f76a6 Robin Murphy 2015-10-01 776 return NULL; 0db2e5d18f76a6 Robin Murphy 2015-10-01 777 } 3b6b7e19e31a81 Robin Murphy 2016-04-13 778 count -= order_size; 3b6b7e19e31a81 Robin Murphy 2016-04-13 779 while (order_size--) 0db2e5d18f76a6 Robin Murphy 2015-10-01 780 pages[i++] = page++; 0db2e5d18f76a6 Robin Murphy 2015-10-01 781 } 0db2e5d18f76a6 Robin Murphy 2015-10-01 782 return pages; 0db2e5d18f76a6 Robin Murphy 2015-10-01 783 } 0db2e5d18f76a6 Robin Murphy 2015-10-01 784 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
