drm/i915: Convert vm->dev backpointer to vm->i915
99% of the time we access i915_address_space->dev we want the i915 device and not the drm device, so let's store the drm_i915_private backpointer instead. The only real complication here are the inlines in i915_vma.h where drm_i915_private is not yet defined and so we have to choose an alternate path for our asserts. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161129095008.32622-1-chris@chris-wilson.co.ukReviewed-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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