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| author | Kirti Wankhede <kwankhede@nvidia.com> | 2020-06-03 00:12:36 +0530 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2020-06-02 13:38:21 -0600 |
| commit | cd0bb41ea86027d3a5c3555772692323cbc05bc1 (patch) | |
| tree | 77528895b6881c2bbfd290e9f0a77616576c232b /drivers/vfio | |
| parent | 95fc87b44104d9a524ff3e975bbfbd7c1f1a2dd5 (diff) | |
| download | linux-cd0bb41ea86027d3a5c3555772692323cbc05bc1.tar.gz linux-cd0bb41ea86027d3a5c3555772692323cbc05bc1.tar.bz2 linux-cd0bb41ea86027d3a5c3555772692323cbc05bc1.zip | |
vfio iommu: Use shift operation for 64-bit integer division
Fixes compilation error with ARCH=i386.
Error fixed by this commit:
ld: drivers/vfio/vfio_iommu_type1.o: in function `vfio_dma_populate_bitmap':
>> vfio_iommu_type1.c:(.text+0x666): undefined reference to `__udivdi3'
Fixes: d6a4c185660c ("vfio iommu: Implementation of ioctl for dirty pages tracking")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index a6d632d44c82..0e4e71799290 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -227,11 +227,12 @@ static void vfio_dma_bitmap_free(struct vfio_dma *dma) static void vfio_dma_populate_bitmap(struct vfio_dma *dma, size_t pgsize) { struct rb_node *p; + unsigned long pgshift = __ffs(pgsize); for (p = rb_first(&dma->pfn_list); p; p = rb_next(p)) { struct vfio_pfn *vpfn = rb_entry(p, struct vfio_pfn, node); - bitmap_set(dma->bitmap, (vpfn->iova - dma->iova) / pgsize, 1); + bitmap_set(dma->bitmap, (vpfn->iova - dma->iova) >> pgshift, 1); } } |