ipc/mqueue.c: remove duplicated code

 * The same algorithm is used for senders.

 */

/* pipelined_send() - send a message directly to the task waiting in

 * sys_mq_timedreceive() (without inserting message into a queue).

 */

static inline void pipelined_send(struct wake_q_head *wake_q,

static inline void __pipelined_op(struct wake_q_head *wake_q,

				  struct mqueue_inode_info *info,

				  struct msg_msg *message,

				  struct ext_wait_queue *receiver)

				  struct ext_wait_queue *this)

{

	receiver->msg = message;

	list_del(&receiver->list);

	wake_q_add(wake_q, receiver->task);

	list_del(&this->list);

	wake_q_add(wake_q, this->task);

	/*

	 * Rely on the implicit cmpxchg barrier from wake_q_add such

	 * that we can ensure that updating receiver->state is the last

	 * yet, at that point we can later have a use-after-free

	 * condition and bogus wakeup.

	 */

	receiver->state = STATE_READY;

	this->state = STATE_READY;

}

/* pipelined_send() - send a message directly to the task waiting in

 * sys_mq_timedreceive() (without inserting message into a queue).

 */

static inline void pipelined_send(struct wake_q_head *wake_q,

				  struct mqueue_inode_info *info,

				  struct msg_msg *message,

				  struct ext_wait_queue *receiver)

{

	receiver->msg = message;

	__pipelined_op(wake_q, info, receiver);

}

/* pipelined_receive() - if there is task waiting in sys_mq_timedsend()

	if (msg_insert(sender->msg, info))

		return;

	list_del(&sender->list);

	wake_q_add(wake_q, sender->task);

	sender->state = STATE_READY;

	__pipelined_op(wake_q, info, sender);

}

static int do_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,