[PATCH] MIPS: dma-default: Use vma_pages helper

[Vasyl Gomonovych]

Use vma_pages function on vma object instead of explicit computation.
arch/mips/mm/dma-default.c:182:34-40: WARNING: Consider using vma_pages helper 
on vma
Generated by: scripts/coccinelle/api/vma_pages.cocci

Signed-off-by: Vasyl Gomonovych <gomonov...@gmail.com>
---
 arch/mips/mm/dma-default.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index c01bd20d0208..bfd504c92719 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -179,7 +179,7 @@ static int mips_dma_mmap(struct device *dev, struct 
vm_area_struct *vma,
        void *cpu_addr, dma_addr_t dma_addr, size_t size,
        unsigned long attrs)
 {
-       unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+       unsigned long user_count = vma_pages(vma);
        unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
        unsigned long addr = (unsigned long)cpu_addr;
        unsigned long off = vma->vm_pgoff;
-- 
1.9.1