_aio_rw
extern int _aio_rw(aiocb_t *, aio_lio_t *, aio_worker_t **, int, int);
error = _aio_rw(aiocbp, head, &__nextworker_rw, rw,
error = _aio_rw(aiocbp, head, &next, AIOFSYNC, AIO_NO_KAIO);
return (_aio_rw(aiocbp, NULL, &__nextworker_rw, AIOAREAD,
return (_aio_rw(aiocbp, NULL, &__nextworker_rw, AIOAWRITE,