__local_lock_nested_bh
__local_lock_nested_bh(&cpu_queue->bh_lock);
__local_lock_nested_bh(__this_cpu_local_lock(_lock))
__local_lock_nested_bh(&cell->bh_lock);
__local_lock_nested_bh(&scratch->bh_lock);
__local_lock_nested_bh(&scratch->bh_lock);