workq_alloc
items = workq_alloc(ncap * sizeof (void *));
wqp = workq_alloc(sizeof (workq_t));
wqp->wq_items = workq_alloc(sizeof (void *) * WORKQ_DEFAULT_CAP);
wqp->wq_thrs = workq_alloc(sizeof (thread_t) *
extern void *workq_alloc(size_t);