i915_ttm_buddy_man_visible_size
i915_ttm_buddy_man_visible_size(man) < man->size &&
place->lpfn == i915_ttm_buddy_man_visible_size(man))
place->lpfn == i915_ttm_buddy_man_visible_size(man))
u64 i915_ttm_buddy_man_visible_size(struct ttm_resource_manager *man);