From 3943875e7b73fdd94dd9e911d69f0cee9ab66a89 Mon Sep 17 00:00:00 2001
From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Wed, 6 Nov 2013 09:32:59 -0800
Subject: [PATCH] drm/ttm: Fix vma page_prot bit manipulation

Fix a long-standing TTM issue where we manipulated the vma page_prot
bits while mmap_sem was taken in read mode only. We now make a local
copy of the vma structure which we pass when we set the ptes.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
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