Hi Liu, 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/Liu-Shixin/mm-hugetlb-independent-PMD-page-table-shared-count/20241214-184912 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20241214104401.1052550-1-liushixin2%40huawei.com patch subject: [PATCH] mm: hugetlb: independent PMD page table shared count config: hexagon-randconfig-001-20241215 (https://download.01.org/0day-ci/archive/20241215/202412151541.SQEZStgy-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 2dc22615fd46ab2566d0f26d5ba234ab12dc4bf8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241215/202412151541.SQEZStgy-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/202412151541.SQEZStgy-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from kernel/dma/direct.c:7: In file included from include/linux/memblock.h:12: include/linux/mm.h:3192:21: error: called object type 'void *' is not a function or function pointer 3192 | ptdesc_pmd_pts_init(ptdesc); | ~~~~~~~~~~~~~~~~~~~^ >> kernel/dma/direct.c:147:20: warning: shift count >= width of type [-Wshift-count-overflow] 146 | if (IS_ENABLED(CONFIG_ZONE_DMA32) && | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 147 | phys_limit < DMA_BIT_MASK(64) && | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 148 | !(gfp & (GFP_DMA32 | GFP_DMA))) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:73:54: note: expanded from macro 'DMA_BIT_MASK' 73 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) | ^ include/linux/compiler.h:55:47: note: expanded from macro 'if' 55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:57:52: note: expanded from macro '__trace_if_var' 57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ >> kernel/dma/direct.c:147:20: warning: shift count >= width of type [-Wshift-count-overflow] 146 | if (IS_ENABLED(CONFIG_ZONE_DMA32) && | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 147 | phys_limit < DMA_BIT_MASK(64) && | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 148 | !(gfp & (GFP_DMA32 | GFP_DMA))) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:73:54: note: expanded from macro 'DMA_BIT_MASK' 73 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) | ^ include/linux/compiler.h:55:47: note: expanded from macro 'if' 55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:57:61: note: expanded from macro '__trace_if_var' 57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ >> kernel/dma/direct.c:147:20: warning: shift count >= width of type [-Wshift-count-overflow] 146 | if (IS_ENABLED(CONFIG_ZONE_DMA32) && | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 147 | phys_limit < DMA_BIT_MASK(64) && | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 148 | !(gfp & (GFP_DMA32 | GFP_DMA))) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:73:54: note: expanded from macro 'DMA_BIT_MASK' 73 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) | ^ include/linux/compiler.h:55:47: note: expanded from macro 'if' 55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:57:86: note: expanded from macro '__trace_if_var' 57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ~~~~~~~~~~~~~~~~~^~~~~ include/linux/compiler.h:68:3: note: expanded from macro '__trace_if_value' 68 | (cond) ? \ | ^~~~ 3 warnings and 1 error generated. vim +147 kernel/dma/direct.c aea7e2a86a94b25 kernel/dma/direct.c Christoph Hellwig 2021-10-21 117 26749b3201ab05e kernel/dma/direct.c Christoph Hellwig 2020-06-15 118 static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, 92826e967535db2 kernel/dma/direct.c Christoph Hellwig 2022-04-23 119 gfp_t gfp, bool allow_highmem) a8463d4b0e47d1f lib/dma-noop.c Christian Borntraeger 2016-02-02 120 { 90ae409f9eb3bca kernel/dma/direct.c Christoph Hellwig 2019-08-20 121 int node = dev_to_node(dev); 080321d3b3139b3 lib/dma-direct.c Christoph Hellwig 2017-12-22 122 struct page *page = NULL; a7ba70f1787f977 kernel/dma/direct.c Nicolas Saenz Julienne 2019-11-21 123 u64 phys_limit; a8463d4b0e47d1f lib/dma-noop.c Christian Borntraeger 2016-02-02 124 633d5fce78a61e8 kernel/dma/direct.c David Rientjes 2020-06-11 125 WARN_ON_ONCE(!PAGE_ALIGNED(size)); 633d5fce78a61e8 kernel/dma/direct.c David Rientjes 2020-06-11 126 aea7e2a86a94b25 kernel/dma/direct.c Christoph Hellwig 2021-10-21 127 if (is_swiotlb_for_alloc(dev)) aea7e2a86a94b25 kernel/dma/direct.c Christoph Hellwig 2021-10-21 128 return dma_direct_alloc_swiotlb(dev, size); aea7e2a86a94b25 kernel/dma/direct.c Christoph Hellwig 2021-10-21 129 25a4ce564921db0 kernel/dma/direct.c Petr Tesarik 2023-02-20 130 gfp |= dma_direct_optimal_gfp_mask(dev, &phys_limit); 633d5fce78a61e8 kernel/dma/direct.c David Rientjes 2020-06-11 131 page = dma_alloc_contiguous(dev, size, gfp); 92826e967535db2 kernel/dma/direct.c Christoph Hellwig 2022-04-23 132 if (page) { 92826e967535db2 kernel/dma/direct.c Christoph Hellwig 2022-04-23 133 if (!dma_coherent_ok(dev, page_to_phys(page), size) || 92826e967535db2 kernel/dma/direct.c Christoph Hellwig 2022-04-23 134 (!allow_highmem && PageHighMem(page))) { 633d5fce78a61e8 kernel/dma/direct.c David Rientjes 2020-06-11 135 dma_free_contiguous(dev, page, size); 90ae409f9eb3bca kernel/dma/direct.c Christoph Hellwig 2019-08-20 136 page = NULL; 90ae409f9eb3bca kernel/dma/direct.c Christoph Hellwig 2019-08-20 137 } 92826e967535db2 kernel/dma/direct.c Christoph Hellwig 2022-04-23 138 } 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 139 again: 90ae409f9eb3bca kernel/dma/direct.c Christoph Hellwig 2019-08-20 140 if (!page) 633d5fce78a61e8 kernel/dma/direct.c David Rientjes 2020-06-11 141 page = alloc_pages_node(node, gfp, get_order(size)); 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 142 if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { f689a3ab7b8ece9 kernel/dma/direct.c Chen Yu 2024-08-31 143 __free_pages(page, get_order(size)); 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 144 page = NULL; 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 145 de7eab301de7886 lib/dma-direct.c Takashi Iwai 2018-04-16 146 if (IS_ENABLED(CONFIG_ZONE_DMA32) && a7ba70f1787f977 kernel/dma/direct.c Nicolas Saenz Julienne 2019-11-21 @147 phys_limit < DMA_BIT_MASK(64) && de7eab301de7886 lib/dma-direct.c Takashi Iwai 2018-04-16 148 !(gfp & (GFP_DMA32 | GFP_DMA))) { de7eab301de7886 lib/dma-direct.c Takashi Iwai 2018-04-16 149 gfp |= GFP_DMA32; de7eab301de7886 lib/dma-direct.c Takashi Iwai 2018-04-16 150 goto again; de7eab301de7886 lib/dma-direct.c Takashi Iwai 2018-04-16 151 } de7eab301de7886 lib/dma-direct.c Takashi Iwai 2018-04-16 152 fbce251baa6e357 kernel/dma/direct.c Christoph Hellwig 2019-02-13 153 if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) { 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 154 gfp = (gfp & ~GFP_DMA32) | GFP_DMA; 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 155 goto again; 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 156 } 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 157 } 95f183916d4b0bc lib/dma-direct.c Christoph Hellwig 2018-01-09 158 b18814e767a4455 kernel/dma/direct.c Christoph Hellwig 2018-11-04 159 return page; b18814e767a4455 kernel/dma/direct.c Christoph Hellwig 2018-11-04 160 } b18814e767a4455 kernel/dma/direct.c Christoph Hellwig 2018-11-04 161 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
