* [PATCH] ARM: MM: Simplify using vma_pages function
@ 2015-11-24 7:38 Mutharaju, Prasanna (P.)
2015-11-25 11:02 ` Marek Szyprowski
0 siblings, 1 reply; 2+ messages in thread
From: Mutharaju, Prasanna (P.) @ 2015-11-24 7:38 UTC (permalink / raw)
To: linux-arm-kernel
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
^ permalink raw reply related [flat|nested] 2+ messages in thread* [PATCH] ARM: MM: Simplify using vma_pages function
2015-11-24 7:38 [PATCH] ARM: MM: Simplify using vma_pages function Mutharaju, Prasanna (P.)
@ 2015-11-25 11:02 ` Marek Szyprowski
0 siblings, 0 replies; 2+ messages in thread
From: Marek Szyprowski @ 2015-11-25 11:02 UTC (permalink / raw)
To: linux-arm-kernel
Hello,
On 2015-11-24 08:38, Mutharaju, Prasanna (P.) wrote:
> 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>
Acked-by: Marek Szyprowski <m.szyprowski@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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2015-11-24 7:38 [PATCH] ARM: MM: Simplify using vma_pages function Mutharaju, Prasanna (P.)
2015-11-25 11:02 ` Marek Szyprowski
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