drm/i915: Disallow direct CPU access to stolen pages for relocations
As we cannot access the backing pages behind stolen objects, we should not attempt to do so for relocations. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-15-chris@chris-wilson.co.uk
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