_aio_create_worker
extern int _aio_create_worker(aio_req_t *, int);
if (_aio_create_worker(reqp, mode))
if (_aio_create_worker(reqp, mode))
(_aio_create_worker(NULL, AIONOTIFY) != 0)) {
(void) _aio_create_worker(NULL, AIOREAD);