From: Libin <huawei.libin@huawei.com>
Date: Mon, 15 Apr 2013 02:48:54 +0000 (+0000)
Subject: PCI: Use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=64b001758e778b2b1aad08aa1f6c5896da5f5773;p=deliverable%2Flinux.git

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>
---

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 9c6e9bb674ec..5b4a9d9cd200 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) ?