STOPLWP
if (STOPLWP(q, td->td_lwp))
if (STOPLWP(p, lp)) {
while (STOPLWP(p, lp)) {
if (__predict_false(STOPLWP(p, lp))) {
while (__predict_false(STOPLWP(lp->lwp_proc, lp))) {
if (STOPLWP(p, lp)) {
while (STOPLWP(lp->lwp_proc, lp)) {