[intel-tdx:guest 72/113] kernel/dma/direct.c:102:20: warning: shift count >= width of type

From: kernel test robot
Date: Sat Aug 28 2021 - 19:19:16 EST

tree: https://github.com/intel/tdx.git guest
head: 44e41606b85b08fad5378c876547f8557f835cf6
commit: 3ccbeb49c9e01c731e46e8238cd8851be8365c15 [72/113] x86/tdx: Add device filter support for x86 TDX guest platform
config: x86_64-randconfig-a001-20210829 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4e1a164d7bd53653f79decc121afe784d2fde0a7)
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
# https://github.com/intel/tdx/commit/3ccbeb49c9e01c731e46e8238cd8851be8365c15
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx guest
git checkout 3ccbeb49c9e01c731e46e8238cd8851be8365c15
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <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:14:
In file included from arch/x86/include/asm/dma.h:13:
In file included from arch/x86/include/asm/io.h:43:
In file included from include/linux/protected_guest.h:36:
In file included from arch/x86/include/asm/protected_guest.h:16:
arch/x86/include/asm/tdx.h:185:12: error: incomplete definition of type 'struct device'
return dev->authorized;
~~~^
include/linux/bitmap.h:13:8: note: forward declaration of 'struct device'
struct device;
^
>> kernel/dma/direct.c:102:20: warning: shift count >= width of type [-Wshift-count-overflow]
phys_limit < DMA_BIT_MASK(64) &&
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 1 error generated.


vim +102 kernel/dma/direct.c

95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 77
26749b3201ab05 kernel/dma/direct.c Christoph Hellwig 2020-06-15 78 static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,
3773dfe6ea4d22 kernel/dma/direct.c Christoph Hellwig 2020-08-17 79 gfp_t gfp)
a8463d4b0e47d1 lib/dma-noop.c Christian Borntraeger 2016-02-02 80 {
90ae409f9eb3bc kernel/dma/direct.c Christoph Hellwig 2019-08-20 81 int node = dev_to_node(dev);
080321d3b3139b lib/dma-direct.c Christoph Hellwig 2017-12-22 82 struct page *page = NULL;
a7ba70f1787f97 kernel/dma/direct.c Nicolas Saenz Julienne 2019-11-21 83 u64 phys_limit;
a8463d4b0e47d1 lib/dma-noop.c Christian Borntraeger 2016-02-02 84
633d5fce78a61e kernel/dma/direct.c David Rientjes 2020-06-11 85 WARN_ON_ONCE(!PAGE_ALIGNED(size));
633d5fce78a61e kernel/dma/direct.c David Rientjes 2020-06-11 86
c84dc6e68a1d24 kernel/dma/direct.c David Rientjes 2020-04-14 87 gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask,
a7ba70f1787f97 kernel/dma/direct.c Nicolas Saenz Julienne 2019-11-21 88 &phys_limit);
633d5fce78a61e kernel/dma/direct.c David Rientjes 2020-06-11 89 page = dma_alloc_contiguous(dev, size, gfp);
90ae409f9eb3bc kernel/dma/direct.c Christoph Hellwig 2019-08-20 90 if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) {
633d5fce78a61e kernel/dma/direct.c David Rientjes 2020-06-11 91 dma_free_contiguous(dev, page, size);
90ae409f9eb3bc kernel/dma/direct.c Christoph Hellwig 2019-08-20 92 page = NULL;
90ae409f9eb3bc kernel/dma/direct.c Christoph Hellwig 2019-08-20 93 }
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 94 again:
90ae409f9eb3bc kernel/dma/direct.c Christoph Hellwig 2019-08-20 95 if (!page)
633d5fce78a61e kernel/dma/direct.c David Rientjes 2020-06-11 96 page = alloc_pages_node(node, gfp, get_order(size));
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 97 if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) {
b1d2dc009dece4 kernel/dma/direct.c Nicolin Chen 2019-05-23 98 dma_free_contiguous(dev, page, size);
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 99 page = NULL;
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 100
de7eab301de788 lib/dma-direct.c Takashi Iwai 2018-04-16 101 if (IS_ENABLED(CONFIG_ZONE_DMA32) &&
a7ba70f1787f97 kernel/dma/direct.c Nicolas Saenz Julienne 2019-11-21 @102 phys_limit < DMA_BIT_MASK(64) &&
de7eab301de788 lib/dma-direct.c Takashi Iwai 2018-04-16 103 !(gfp & (GFP_DMA32 | GFP_DMA))) {
de7eab301de788 lib/dma-direct.c Takashi Iwai 2018-04-16 104 gfp |= GFP_DMA32;
de7eab301de788 lib/dma-direct.c Takashi Iwai 2018-04-16 105 goto again;
de7eab301de788 lib/dma-direct.c Takashi Iwai 2018-04-16 106 }
de7eab301de788 lib/dma-direct.c Takashi Iwai 2018-04-16 107
fbce251baa6e35 kernel/dma/direct.c Christoph Hellwig 2019-02-13 108 if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) {
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 109 gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 110 goto again;
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 111 }
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 112 }
95f183916d4b0b lib/dma-direct.c Christoph Hellwig 2018-01-09 113
b18814e767a445 kernel/dma/direct.c Christoph Hellwig 2018-11-04 114 return page;
b18814e767a445 kernel/dma/direct.c Christoph Hellwig 2018-11-04 115 }
b18814e767a445 kernel/dma/direct.c Christoph Hellwig 2018-11-04 116

:::::: The code at line 102 was first introduced by commit
:::::: a7ba70f1787f977f970cd116076c6fce4b9e01cc dma-mapping: treat dev->bus_dma_mask as a DMA limit

:::::: TO: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
:::::: CC: Christoph Hellwig <hch@xxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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