From: Muhammad Falak R Wani <falakreyaz@gmail.com>
Date: Sat, 21 May 2016 13:22:57 +0000 (+0530)
Subject: drivers: dma-coherent: use vma_pages().
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e688f144305c678fb65138d9e6b6ce436e59778b;p=linux-beck.git

drivers: dma-coherent: use vma_pages().

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

Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index bdf28f7dd5e8..db122a06edc5 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;