1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 8c398fedbbb6..c25cca69ab46 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -845,7 +845,7 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
                  unsigned long attrs)
 {
         int ret;
-        unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+        unsigned long nr_vma_pages = vma_pages(vma);
         unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
         unsigned long pfn = dma_to_pfn(dev, dma_addr);
         unsigned long off = vma->vm_pgoff;