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net: suppress lockdep-RCU false positive in FIB trie.
Allow fib_find_node() to be called either under rcu_read_lock() protection or with RTNL held. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -961,7 +961,9 @@ fib_find_node(struct trie *t, u32 key)
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struct node *n;
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pos = 0;
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n = rcu_dereference(t->trie);
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n = rcu_dereference_check(t->trie,
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rcu_read_lock_held() ||
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lockdep_rtnl_is_held());
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while (n != NULL && NODE_TYPE(n) == T_TNODE) {
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tn = (struct tnode *) n;
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