Use vma_pages function on vma object instead of explicit computation.
Found by coccinelle spatch "api/vma_pages.cocci"
Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---
diff -u -p a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
--- 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_
{
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;
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