[PATCH] drivers: dma-coherent: use vma_pages().

[Muhammad Falak R Wani]

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

Signed-off-by: Muhammad Falak R Wani <falakre...@gmail.com>
---
 drivers/base/dma-coherent.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index bdf28f7..db122a0 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -261,7 +261,7 @@ int dma_mmap_from_coherent(struct device *dev, struct 
vm_area_struct *vma,
                   (mem->virt_base + (mem->size << PAGE_SHIFT))) {
                unsigned long off = vma->vm_pgoff;
                int start = (vaddr - mem->virt_base) >> PAGE_SHIFT;
-               int user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+               int user_count = vma_pages(vma);
                int count = size >> PAGE_SHIFT;
 
                *ret = -ENXIO;
-- 
1.9.1