Re: [PATCH] mm: hugetlb: independent PMD page table shared count

From: kernel test robot
Date: Sun Dec 15 2024 - 02:46:30 EST

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In reply to: kernel test robot: "Re: [PATCH] mm: hugetlb: independent PMD page table shared count"
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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

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Next message: Dragan Simic: "Re: [PATCH 1/3] dt-bindings: clock: sunxi: Export PLL_VIDEO_2X and PLL_MIPI"
Previous message: David Woodhouse: "Re: [PATCH v5 07/20] x86/kexec: Invoke copy of relocate_kernel() instead of the original"
In reply to: kernel test robot: "Re: [PATCH] mm: hugetlb: independent PMD page table shared count"
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