static void wake_up_sem_queue_prepare(struct list_head *pt,
				struct sem_queue *q, int error)
{
	if (list_empty(pt)) {
		/*
		 * Hold preempt off so that we don't get preempted and have the
		 * wakee busy-wait until we're scheduled back on.
		 */
		preempt_disable();
	}
	q->status = IN_WAKEUP;
	q->pid = error;

	list_add_tail(&q->list, pt);
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.