356 	struct fib6_info *from;  in ip6_dst_destroy()  local
368 	from = xchg((__force struct fib6_info **)&rt->from, NULL);  in ip6_dst_destroy()
369 	fib6_info_release(from);  in ip6_dst_destroy()
399 	struct fib6_info *from;  in rt6_check_expired()  local
401 	from = rcu_dereference(rt->from);  in rt6_check_expired()
406 	} else if (from) {  in rt6_check_expired()
408 			fib6_check_expired(from);  in rt6_check_expired()
1109 static void rt6_set_from(struct rt6_info *rt, struct fib6_info *from)  in rt6_set_from()  argument
1112 	rcu_assign_pointer(rt->from, from);  in rt6_set_from()
1113 	ip_dst_init_metrics(&rt->dst, from->fib6_metrics);  in rt6_set_from()
1426 		struct fib6_info *from;  in rt6_make_pcpu_route()  local
1428 		from = xchg((__force struct fib6_info **)&pcpu_rt->from, NULL);  in rt6_make_pcpu_route()
1429 		fib6_info_release(from);  in rt6_make_pcpu_route()
1445 	struct fib6_info *from;  in rt6_remove_exception()  local
1457 	from = xchg((__force struct fib6_info **)&rt6_ex->rt6i->from, NULL);  in rt6_remove_exception()
1458 	fib6_info_release(from);  in rt6_remove_exception()
1734 static void fib6_nh_flush_exceptions(struct fib6_nh *nh, struct fib6_info *from)  in fib6_nh_flush_exceptions()  argument
1748 	if (!from)  in fib6_nh_flush_exceptions()
1753 			if (!from ||  in fib6_nh_flush_exceptions()
1754 			    rcu_access_pointer(rt6_ex->rt6i->from) == from)  in fib6_nh_flush_exceptions()
1757 		WARN_ON_ONCE(!from && bucket->depth);  in fib6_nh_flush_exceptions()
1885 	struct fib6_info *from;  in rt6_remove_exception_rt()  local
1887 	from = rcu_dereference(rt->from);  in rt6_remove_exception_rt()
1888 	if (!from || !(rt->rt6i_flags & RTF_CACHE))  in rt6_remove_exception_rt()
1891 	if (from->nh) {  in rt6_remove_exception_rt()
1894 			.plen = from->fib6_src.plen  in rt6_remove_exception_rt()
1899 		rc = nexthop_for_each_fib6_nh(from->nh,  in rt6_remove_exception_rt()
1905 	return fib6_nh_remove_exception(from->fib6_nh,  in rt6_remove_exception_rt()
1906 					from->fib6_src.plen, rt);  in rt6_remove_exception_rt()
1960 	struct fib6_info *from;  in rt6_update_exception_stamp_rt()  local
1965 	from = rcu_dereference(rt->from);  in rt6_update_exception_stamp_rt()
1966 	if (!from || !(rt->rt6i_flags & RTF_CACHE))  in rt6_update_exception_stamp_rt()
1969 	if (from->nh) {  in rt6_update_exception_stamp_rt()
1975 		nexthop_for_each_fib6_nh(from->nh, fib6_nh_find_match, &arg);  in rt6_update_exception_stamp_rt()
1981 		fib6_nh = from->fib6_nh;  in rt6_update_exception_stamp_rt()
1983 	fib6_nh_update_exception(fib6_nh, from->fib6_src.plen, rt);  in rt6_update_exception_stamp_rt()
2706 				   struct fib6_info *from,  in rt6_check()  argument
2711 	if (!from || !fib6_get_cookie_safe(from, &rt_cookie) ||  in rt6_check()
2722 					    struct fib6_info *from,  in rt6_dst_from_check()  argument
2727 	    fib6_check(from, cookie))  in rt6_dst_from_check()
2737 	struct fib6_info *from;  in ip6_dst_check()  local
2752 	from = rcu_dereference(rt->from);  in ip6_dst_check()
2754 	if (from && (rt->rt6i_flags & RTF_PCPU ||  in ip6_dst_check()
2756 		dst_ret = rt6_dst_from_check(rt, from, cookie);  in ip6_dst_check()
2758 		dst_ret = rt6_check(rt, from, cookie);  in ip6_dst_check()
2798 			struct fib6_info *from;  in ip6_link_failure()  local
2801 			from = rcu_dereference(rt->from);  in ip6_link_failure()
2802 			if (from) {  in ip6_link_failure()
2803 				fn = rcu_dereference(from->fib6_node);  in ip6_link_failure()
2815 		struct fib6_info *from;  in rt6_update_expires()  local
2818 		from = rcu_dereference(rt0->from);  in rt6_update_expires()
2819 		if (from)  in rt6_update_expires()
2820 			rt0->dst.expires = from->expires;  in rt6_update_expires()
2840 		(rt->rt6i_flags & RTF_PCPU || rcu_access_pointer(rt->from));  in rt6_cache_allowed_for_pmtu()
2884 		res.f6i = rcu_dereference(rt6->from);  in __ip6_rt_update_pmtu()
4221 	res.f6i = rcu_dereference(rt->from);  in rt6_do_redirect()
6016 	struct fib6_info *from;  in inet6_rtm_getroute()  local
6127 	from = rcu_dereference(rt->from);  in inet6_rtm_getroute()
6128 	if (from) {  in inet6_rtm_getroute()
6130 			err = rt6_fill_node(net, skb, from, NULL, NULL, NULL,  in inet6_rtm_getroute()
6135 			err = rt6_fill_node(net, skb, from, dst, &fl6.daddr,  in inet6_rtm_getroute()