[PATCH 1/7] ARM: dma-mapping: Cocci spatch "vma_pages"

[Thomas Meyer]

Use vma_pages function on vma object instead of explicit computation.
Found by coccinelle spatch "api/vma_pages.cocci"

Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---

diff -u -p a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -846,7 +846,7 @@ static int __arm_dma_mmap(struct device
                 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;