linux-kernel - [PATCH] MIPS: dma-default: Use vma

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Date:   Thu, 23 Nov 2017 00:16:12 +0100
From:   Vasyl Gomonovych <gomonovych@...il.com>
To:     ralf@...ux-mips.org, paul.burton@...s.com,
        pure.logic@...us-software.ie, akpm@...ux-foundation.org,
        bart.vanassche@...disk.com, vladimir.murzin@....com,
        l.stach@...gutronix.de, alexander.h.duyck@...el.com,
        linux-mips@...ux-mips.org
Cc:     linux-kernel@...r.kernel.org, gomonovych@...il.com
Subject: [PATCH] MIPS: dma-default: Use vma_pages helper

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 <gomonovych@...il.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