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

From	Muhammad Falak R Wani <falakreyaz@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH] drivers: dma-coherent: use vma_pages().
Date	2016-05-21 15:30 +0200
Message-ID	<rBf8B-40U-7@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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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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[PATCH] drivers: dma-coherent: use vma_pages(). Muhammad Falak R Wani <falakreyaz@gmail.com> - 2016-05-21 15:30 +0200

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