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drm: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT 

(*->vm_end - *->vm_start) >> PAGE_SHIFT operation is implemented
as a inline funcion vma_pages() in linux/mm.h, so using it.

Signed-off-by: Libin <huawei.libin@huawei.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Libin 2013-04-15 20:48:57 +08:00 committed by Dave Airlie
parent 87d24fc3ab
commit 025df77554
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/ttm/ttm_bo_vm.c
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@ -147,7 +147,7 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
bo->vm_node->start - vma->vm_pgoff;
page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) +
page_last = vma_pages(vma) +
bo->vm_node->start - vma->vm_pgoff;
if (unlikely(page_offset >= bo->num_pages)) {
@ -258,7 +258,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
read_lock(&bdev->vm_lock);
bo = ttm_bo_vm_lookup_rb(bdev, vma->vm_pgoff,
(vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
vma_pages(vma));
if (likely(bo != NULL) && !kref_get_unless_zero(&bo->kref))
bo = NULL;
read_unlock(&bdev->vm_lock);