From: mkarthi3@visteon.com (Mutharaju, Prasanna (P.))
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: MM: Simplify using vma_pages function
Date: Tue, 24 Nov 2015 07:38:12 +0000 [thread overview]
Message-ID: <20151124073805.GA23513@jci-VirtualBox> (raw)
From: Prasanna Karthik <mkarthi3@visteon.com>
Use vma_pages function on vma object instead of explicit computation.
Signed-off-by: Prasanna Karthik <mkarthi3@visteon.com>
---
arch/arm/mm/dma-mapping.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index ad4eb2d..513e213 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -694,7 +694,7 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
{
int ret = -ENXIO;
#ifdef CONFIG_MMU
- 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;
--
1.9.1
next reply other threads:[~2015-11-24 7:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-24 7:38 Mutharaju, Prasanna (P.) [this message]
2015-11-25 11:02 ` [PATCH] ARM: MM: Simplify using vma_pages function Marek Szyprowski
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