drm/rockchip: Cocci spatch "vma_pages"

Use vma_pages function on vma object instead of explicit computation.
Found by coccinelle spatch "api/vma_pages.cocci"

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1505946334393-988165015-7-diffsplit-thomas@m3y3r.de

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index 1869c8bb76c8173677be56c1d68a8364cf80a1f2..1d9655576b6efe4ed5af5709265441fb5115607a 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -220,7 +220,7 @@ static int rockchip_drm_gem_object_mmap_iommu(struct drm_gem_object *obj,
 {
        struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
        unsigned int i, count = obj->size >> PAGE_SHIFT;
-       unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+       unsigned long user_count = vma_pages(vma);
        unsigned long uaddr = vma->vm_start;
        unsigned long offset = vma->vm_pgoff;
        unsigned long end = user_count + offset;