fib_rules: __rcu annotates ctarget

Adds __rcu annotation to (struct fib_rule)->ctarget

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 106f309..075f1e3 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -20,7 +20,7 @@
 	u32			table;
 	u8			action;
 	u32			target;
-	struct fib_rule *	ctarget;
+	struct fib_rule __rcu	*ctarget;
 	char			iifname[IFNAMSIZ];
 	char			oifname[IFNAMSIZ];
 	struct rcu_head		rcu;