linux-kernel - Re: [PATCH 2/6] PCI: use vma_pages() to replace (vm_end

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Message-ID: <CAErSpo6zpqkVZA-tbb8zXd9=WQ71JUCNPwDzx=009=Kv8tHgGw@mail.gmail.com>
Date:	Mon, 15 Apr 2013 12:09:34 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Libin <huawei.libin@...wei.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Airlie <airlied@...ux.ie>,
	"Hans J. Koch" <hjk@...sjkoch.de>,
	Petr Vandrovec <petr@...drovec.name>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Thomas Hellstrom <thellstrom@...are.com>,
	Dave Airlie <airlied@...hat.com>,
	Nadia Yvette Chambers <nyc@...omorphy.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Al Viro <viro@...iv.linux.org.uk>,
	Mel Gorman <mgorman@...e.de>, Hugh Dickins <hughd@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Michel Lespinasse <walken@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	linux-mm@...ck.org, Hanjun Guo <guohanjun@...wei.com>,
	Yijing Wang <wangyijing@...wei.com>
Subject: Re: [PATCH 2/6] PCI: use vma_pages() to replace (vm_end - vm_start)
 >> PAGE_SHIFT

On Mon, Apr 15, 2013 at 6:48 AM, Libin <huawei.libin@...wei.com> wrote:
> (*->vm_end - *->vm_start) >> PAGE_SHIFT operation is implemented
> as a inline funcion vma_pages() in linux/mm.h, so using it.
>
> Signed-off-by: Libin <huawei.libin@...wei.com>

Applied to my pci/misc branch for v3.10, thanks!

Bjorn

> ---
>  drivers/pci/pci-sysfs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
> index 9c6e9bb..5b4a9d9 100644
> --- a/drivers/pci/pci-sysfs.c
> +++ b/drivers/pci/pci-sysfs.c
> @@ -897,7 +897,7 @@ int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
>
>         if (pci_resource_len(pdev, resno) == 0)
>                 return 0;
> -       nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
> +       nr = vma_pages(vma);
>         start = vma->vm_pgoff;
>         size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
>         pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
> --
> 1.8.2.1
>
>
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