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PCI: Use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT 

(*->vm_end - *->vm_start) >> PAGE_SHIFT operation is implemented
as an inline funcion vma_pages() in linux/mm.h, so use it.

Signed-off-by: Libin <huawei.libin@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Libin 2013-04-15 02:48:54 +00:00 committed by Bjorn Helgaas
parent 545d7b78e0
commit 64b001758e
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pci-sysfs.c
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@ -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) ?