Man page 9 : queue_delayed_work_on

queue_delayed_work_on - queue work on specific CPU after delay

bool queue_delayed_work_on(int  cpu , struct workqueue_struct *  wq , struct delayed_work *  dwork , unsigned long  delay );

cpu
    CPU number to execute work on

wq
    workqueue to use

dwork
    work to queue

delay
    number of jiffies to wait before queueing

Returns false if work was already on a queue, true otherwise. If delay is zero and dwork is idle, it will be scheduled for immediate execution.