ipc/sem.c: bugfix for semop() not reporting successful operation

	return un;

}

/**

 * get_queue_result - Retrieve the result code from sem_queue

 * @q: Pointer to queue structure

 *

 * Retrieve the return code from the pending queue. If IN_WAKEUP is found in

 * q->status, then we must loop until the value is replaced with the final

 * value: This may happen if a task is woken up by an unrelated event (e.g.

 * signal) and in parallel the task is woken up by another task because it got

 * the requested semaphores.

 *

 * The function can be called with or without holding the semaphore spinlock.

 */

static int get_queue_result(struct sem_queue *q)

{

	int error;

	error = q->status;

	while (unlikely(error == IN_WAKEUP)) {

		cpu_relax();

		error = q->status;

	}

	return error;

}

SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops,

		unsigned, nsops, const struct timespec __user *, timeout)

{

	else

		schedule();

	error = queue.status;

	while(unlikely(error == IN_WAKEUP)) {

		cpu_relax();

		error = queue.status;

	}

	error = get_queue_result(&queue);

	if (error != -EINTR) {

		/* fast path: update_queue already obtained all requested

		 * resources */

		 * resources.

		 * Perform a smp_mb(): User space could assume that semop()

		 * is a memory barrier: Without the mb(), the cpu could

		 * speculatively read in user space stale data that was

		 * overwritten by the previous owner of the semaphore.

		 */

		smp_mb();

		goto out_free;

	}

		goto out_free;

	}

	error = get_queue_result(&queue);

	/*

	 * If queue.status != -EINTR we are woken up by another process

	 */

	error = queue.status;

	if (error != -EINTR) {

		goto out_unlock_free;

	}