bl_pipe_msg
struct bl_pipe_msg *bl_pipe_msg =
container_of(msg, struct bl_pipe_msg, msg);
wake_up(bl_pipe_msg->bl_wq);
struct bl_pipe_msg bl_pipe_msg;
struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
bl_pipe_msg.bl_wq = &nn->bl_wq;