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drm: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT
authorLibin <huawei.libin@huawei.com>
Mon, 15 Apr 2013 12:48:57 +0000 (20:48 +0800)
committerDave Airlie <airlied@redhat.com>
Tue, 16 Apr 2013 03:14:00 +0000 (13:14 +1000)
(*->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>

No differences found
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