From dab069c61aa386f6a46c620f3a1075a4818f285b Mon Sep 17 00:00:00 2001
From: David Vrabel <david.vrabel@citrix.com>
Date: Thu, 18 Dec 2014 14:59:07 +0000
Subject: [PATCH] xen/gntdev: provide find_special_page VMA operation

For a PV guest, use the find_special_page op to find the right page.
To handle VMAs being split, remember the start of the original VMA so
the correct index in the pages array can be calculated.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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Reading git-format-patch failed