Re: [PATCH v16 Kernel 4/7] vfio iommu: Implementation of ioctl for dirty pages tracking.

[kbuild test robot <lkp@intel.com>]

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Hi Kirti,

I love your patch! Yet something to improve:

[auto build test ERROR on vfio/next]
[also build test ERROR on next-20200326]
[cannot apply to v5.6-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Kirti-Wankhede/KABIs-to-support-migration-for-VFIO-devices/20200326-043159
base:   https://github.com/awilliam/linux-vfio.git next
config: i386-randconfig-c001-20200326 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-5) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: drivers/vfio/vfio_iommu_type1.o: in function `vfio_dma_bitmap_alloc':
>> drivers/vfio/vfio_iommu_type1.c:197: undefined reference to `__udivdi3'
   ld: drivers/vfio/vfio_iommu_type1.o: in function `vfio_dma_populate_bitmap':
   drivers/vfio/vfio_iommu_type1.c:225: undefined reference to `__udivdi3'

vim +197 drivers/vfio/vfio_iommu_type1.c

   193	
   194	
   195	static int vfio_dma_bitmap_alloc(struct vfio_dma *dma, uint64_t pgsize)
   196	{
 > 197		uint64_t npages = dma->size / pgsize;
   198	
   199		if (npages > DIRTY_BITMAP_PAGES_MAX)
   200			return -EINVAL;
   201	
   202		dma->bitmap = kvzalloc(DIRTY_BITMAP_BYTES(npages), GFP_KERNEL);
   203		if (!dma->bitmap)
   204			return -ENOMEM;
   205	
   206		return 0;
   207	}
   208	

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

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