[PATCH] ARM: MM: Simplify using vma_pages function
Marek Szyprowski
m.szyprowski at samsung.com
Wed Nov 25 03:02:59 PST 2015
Hello,
On 2015-11-24 08:38, Mutharaju, Prasanna (P.) wrote:
> From: Prasanna Karthik <mkarthi3 at visteon.com>
>
> Use vma_pages function on vma object instead of explicit computation.
>
> Signed-off-by: Prasanna Karthik <mkarthi3 at visteon.com>
Acked-by: Marek Szyprowski <m.szyprowski at samsung.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;
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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