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

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Message-ID: <1559160524648-1049343203-1-diffsplit-thomas@m3y3r.de>
Date:   Wed, 29 May 2019 22:11:06 +0200
From:   "Thomas Meyer" <thomas@...3r.de>
To:     alex.williamson@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] vfio-pci/nvlink2: Use vma_pages function instead of explicit
 computation

Use vma_pages function on vma object instead of explicit computation.

Signed-off-by: Thomas Meyer <thomas@...3r.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,