if_congestion     329 net/if.h       			if_congestion(ifq);				\
if_congestion     736 net/if.h       void	if_congestion(struct ifqueue *);
if_congestion    1546 net/if_ppp.c   		if_congestion(inq);
if_congestion     886 net/if_sl.c    				if_congestion(&ipintrq);
if_congestion     604 net/if_spppsubr.c 			if_congestion(inq);
if_congestion    1272 net/if_strip.c 			if_congestion(&ipintrq);
if_congestion     901 net/if_tun.c   			if_congestion(ifq);