get_page
radix_tree_for_each_slot(slot, &obj->mm.get_page.radix, &iter, 0)
radix_tree_delete(&obj->mm.get_page.radix, iter.index);
obj->mm.get_page.sg_pos = pages->sgl;
obj->mm.get_page.sg_idx = 0;
INIT_RADIX_TREE(&obj->mm.get_page.radix, GFP_KERNEL | __GFP_NOWARN);
lockinit(&obj->mm.get_page.lock, "i915ogpl", 0, LK_CANRECURSE);
struct i915_gem_object_page_iter *iter = &obj->mm.get_page;
} get_page;