pdu_alloc
if((pq = pdu_alloc(sp->isc, M_NOWAIT)) == NULL)
pq = pdu_alloc(sp->isc, M_NOWAIT);
pq = pdu_alloc(sp->isc, M_NOWAIT); // OK to WAIT
if((pq = pdu_alloc(sc, M_NOWAIT)) == NULL)
while((wpq = pdu_alloc(sp->isc, M_NOWAIT)) == NULL) {
if((pq = pdu_alloc(isp, M_NOWAIT)) == NULL) {
while((pq = pdu_alloc(sp->isc, M_NOWAIT)) == NULL) {
wpq = pdu_alloc(sp->isc, M_NOWAIT); // testing ...