gpu: drm: gma500: Use vma_pages()

Replace explicit computation of vma page count by a call to
vma_pages()

Signed-off-by: Shyam Saini <mayhs11saini@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1476054436-9378-1-git-send-email-mayhs11saini@gmail.com

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 3a44e705db53..0fde8503607c 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -124,7 +124,7 @@ static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
                                   psbfb->gtt->offset;
 
-        page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+        page_num = vma_pages(vma);
         address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);
 
         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);