DEQUEUE_ALL
(void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_AFTERXCHG, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_READDIR, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_AFTERWRITE, DEQUEUE_ALL);
(void)dequeue_requests(opc, PCQ_REF, DEQUEUE_ALL);