PS_ITIMER
if (ISSET(p->p_p->ps_flags, PS_ITIMER)) {
if (!ISSET(pr->ps_flags, PS_ITIMER))
atomic_setbits_int(&ps->ps_flags, PS_ITIMER);
atomic_clearbits_int(&ps->ps_flags, PS_ITIMER);
if (ISSET(p->p_p->ps_flags, PS_ITIMER)) {