prefix_create
pr = prefix_create(pi, po->nd_opt_pi_prefix, plen, 0);
pr = prefix_create(pi, po->nd_opt_pi_prefix,
pr = prefix_create(pi, po->nd_opt_pi_prefix, plen, 0);
pr = prefix_create(pi, po->nd_opt_pi_prefix, plen,
newpr = prefix_create(pi, pr->pr_prefix, pr->pr_prefix_len,
extern struct prefix *prefix_create(struct phyint *pi, struct in6_addr addr,