ONLY_LWP_IN_PROC
lp = ONLY_LWP_IN_PROC(p);
lp = ONLY_LWP_IN_PROC(initproc);
struct lwp *lp2 = ONLY_LWP_IN_PROC(p2);
lp = ONLY_LWP_IN_PROC(p);
p->p_usched->release_curproc(ONLY_LWP_IN_PROC(p));
p->p_usched->heuristic_exiting(ONLY_LWP_IN_PROC(p), p);
iod->iod_td = ONLY_LWP_IN_PROC(newp)->lwp_thread;
lp2 = ONLY_LWP_IN_PROC(p2);
cpu_fork(ONLY_LWP_IN_PROC(p1), NULL, flags);