From: Thomas Meyer <thomas@m3y3r.de>
Date: Wed, 20 Sep 2017 22:29:36 +0000 (+0200)
Subject: arm64: dma-mapping: Cocci spatch "vma_pages"
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=b4f4a2755665bf847231050b569f587ce0945482;p=openwrt%2Fstaging%2Fblogic.git

arm64: dma-mapping: Cocci spatch "vma_pages"

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

Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 614af886b7ef..5f62090bda24 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -303,8 +303,7 @@ static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
 			      unsigned long pfn, size_t size)
 {
 	int ret = -ENXIO;
-	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 off = vma->vm_pgoff;