[PATCH] vfio-pci/nvlink2: Use vma_pages function instead of explicit computation

[Thomas Meyer]

Use vma_pages function on vma object instead of explicit computation.

Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---

diff -u -p a/drivers/vfio/pci/vfio_pci_nvlink2.c 
b/drivers/vfio/pci/vfio_pci_nvlink2.c
--- a/drivers/vfio/pci/vfio_pci_nvlink2.c
+++ b/drivers/vfio/pci/vfio_pci_nvlink2.c
@@ -161,7 +161,7 @@ static int vfio_pci_nvgpu_mmap(struct vf
 
        atomic_inc(&data->mm->mm_count);
        ret = (int) mm_iommu_newdev(data->mm, data->useraddr,
-                       (vma->vm_end - vma->vm_start) >> PAGE_SHIFT,
+                       vma_pages(vma),
                        data->gpu_hpa, &data->mem);
 
        trace_vfio_pci_nvgpu_mmap(vdev->pdev, data->gpu_hpa, data->useraddr,