From 64b001758e778b2b1aad08aa1f6c5896da5f5773 Mon Sep 17 00:00:00 2001
From: Libin <huawei.libin@huawei.com>
Date: Mon, 15 Apr 2013 02:48:54 +0000
Subject: [PATCH] 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>
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