From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.szyprowski@samsung.com (Marek Szyprowski) Date: Wed, 25 Nov 2015 12:02:59 +0100 Subject: [PATCH] ARM: MM: Simplify using vma_pages function In-Reply-To: <20151124073805.GA23513@jci-VirtualBox> References: <20151124073805.GA23513@jci-VirtualBox> Message-ID: <56559563.9060305@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello, On 2015-11-24 08:38, Mutharaju, Prasanna (P.) wrote: > From: Prasanna Karthik > > Use vma_pages function on vma object instead of explicit computation. > > Signed-off-by: Prasanna Karthik Acked-by: Marek Szyprowski > --- > 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