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Libin
545d7b78e0b
Libin committed 64b001758e7
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>