rh->rt_forw = rh->rt_back = (struct rt_entry *)rh;
for (rh = hosthash; rh < &hosthash[ROUTEHASHSIZ]; rh++)
rh->rt_forw = rh->rt_back = (struct rt_entry *)rh;
rh->rt_forw = rh->rt_back = (struct rt_entry *)rh;
for (rh = hosthash; rh < &hosthash[ROUTEHASHSIZ]; rh++)
rh->rt_forw = rh->rt_back = (struct rt_entry *)rh;