Commit 4eaa0e3c authored Apr 14, 2010 by Eric Dumazet Committed by David S. Miller Apr 14, 2010

fib: suppress lockdep-RCU false positive in FIB trie.



Followup of commit 634a4b20

Allow tnode_get_child_rcu() to be called either under rcu_read_lock()
protection or with RTNL held.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 0110d6f2

net/ipv4/fib_trie.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -209,7 +209,9 @@ static inline struct node tnode_get_child_rcu(struct tnode tn, unsigned int i)
		{
		struct node *ret = tnode_get_child(tn, i);

		return rcu_dereference(ret);
		return rcu_dereference_check(ret,
		rcu_read_lock_held() \|\|
		lockdep_rtnl_is_held());
		}

		static inline int tnode_child_length(const struct tnode *tn)