rcu_dereference_check
return rcu_dereference_check(obj->fences, dma_resv_held(obj));
tmp = (long)rcu_dereference_check(list->table[index],
prev = rcu_dereference_check(entity->last_scheduled, true);
dma_fence_put(rcu_dereference_check(entity->last_scheduled, true));
dma_fence_put(rcu_dereference_check(entity->last_scheduled, true));
fence = rcu_dereference_check(entity->last_scheduled, true);