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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2010-04-26 20:40:43 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-04-27 12:53:26 -0700 |
| commit | 0b53ff2eadb1db6818894435f85989fb05d7e718 (patch) | |
| tree | 6c7ecececdb6a094c68b4af122aed788648a2b13 /include | |
| parent | rps: inet_rps_save_rxhash() argument is not const (diff) | |
| download | linux-dev-0b53ff2eadb1db6818894435f85989fb05d7e718.tar.xz linux-dev-0b53ff2eadb1db6818894435f85989fb05d7e718.zip | |
net: fix a lockdep rcu warning in __sk_dst_set()
__sk_dst_set() might be called while no state can be integrated in a
rcu_dereference_check() condition.
So use rcu_dereference_raw() to shutup lockdep warnings (if
CONFIG_PROVE_RCU is set)
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/sock.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 86a8ca177a29..4081db86a352 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1236,8 +1236,11 @@ __sk_dst_set(struct sock *sk, struct dst_entry *dst) struct dst_entry *old_dst; sk_tx_queue_clear(sk); - old_dst = rcu_dereference_check(sk->sk_dst_cache, - lockdep_is_held(&sk->sk_dst_lock)); + /* + * This can be called while sk is owned by the caller only, + * with no state that can be checked in a rcu_dereference_check() cond + */ + old_dst = rcu_dereference_raw(sk->sk_dst_cache); rcu_assign_pointer(sk->sk_dst_cache, dst); dst_release(old_dst); } |