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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-03-21 18:01:05 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-21 18:01:05 -0700 |
| commit | 634a4b2038a6eba4c211fb906fa2f6ec9a4bbfc7 (patch) | |
| tree | 69ef8d5afc51d632db7744d94f4de0224e627104 /net | |
| parent | af98441397227a5a4f212cd48710eea72a14dbdb (diff) | |
| download | linux-stable-634a4b2038a6eba4c211fb906fa2f6ec9a4bbfc7.tar.gz linux-stable-634a4b2038a6eba4c211fb906fa2f6ec9a4bbfc7.tar.bz2 linux-stable-634a4b2038a6eba4c211fb906fa2f6ec9a4bbfc7.zip | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_trie.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index af5d89792860..01ef8ba9025c 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -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; |