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Commit 634a4b20 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by David S. Miller
Browse files

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent af984413

net/ipv4/fib_trie.c

+3 −1
Original line number Diff line number Diff line
@@ -961,7 +961,9 @@ fib_find_node(struct trie *t, u32 key) 
	struct node *n;



	pos = 0;

	n = rcu_dereference(t->trie);

	n = rcu_dereference_check(t->trie,

				  rcu_read_lock_held() ||

				  lockdep_rtnl_is_held());



	while (n != NULL &&  NODE_TYPE(n) == T_TNODE) {

		tn = (struct tnode *) n;