linux-kernel - [PATCH 1/7] ARM: dma-mapping: Cocci spatch "vma

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Message-ID: <1505946334393-1455306870-1-diffsplit-thomas@m3y3r.de>
Date:   Thu, 21 Sep 2017 00:29:36 +0200
From:   Thomas Meyer <thomas@...3r.de>
To:     linux@...linux.org.uk, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] ARM: 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"

Signed-off-by: Thomas Meyer <thomas@...3r.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;