169 static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur,  in ndisc_next_option()  argument
173 	if (!cur || !end || cur >= end)  in ndisc_next_option()
175 	type = cur->nd_opt_type;  in ndisc_next_option()
177 		cur = ((void *)cur) + (cur->nd_opt_len << 3);  in ndisc_next_option()
178 	} while (cur < end && cur->nd_opt_type != type);  in ndisc_next_option()
179 	return cur <= end && cur->nd_opt_type == type ? cur : NULL;  in ndisc_next_option()
188 static struct nd_opt_hdr *ndisc_next_useropt(struct nd_opt_hdr *cur,  in ndisc_next_useropt()  argument
191 	if (!cur || !end || cur >= end)  in ndisc_next_useropt()
194 		cur = ((void *)cur) + (cur->nd_opt_len << 3);  in ndisc_next_useropt()
195 	} while (cur < end && !ndisc_is_useropt(cur));  in ndisc_next_useropt()
196 	return cur <= end && ndisc_is_useropt(cur) ? cur : NULL;  in ndisc_next_useropt()