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Subject[PATCH] drivers: dma-coherent: use vma_pages().
Date
Replace explicit computation of vma page count by a call to
vma_pages()

Signed-off-by: Muhammad Falak R Wani <falakreyaz@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
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