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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-03-16 10:32:42 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-16 21:29:20 -0700 |
| commit | d12c917691b45d9dffcfe7c2362d25caa40905fd (patch) | |
| tree | f2e7a8d5f346f39bc220147fcfc5b3a70c9f8999 /net | |
| parent | 4d4a6ac73e7466c2085c307fac41f74ce4568a45 (diff) | |
| download | linux-0-day-d12c917691b45d9dffcfe7c2362d25caa40905fd.tar.gz linux-0-day-d12c917691b45d9dffcfe7c2362d25caa40905fd.tar.xz | |
bridge: resolve a false alarm of lockdep
Andrei reported a false alarm of lockdep at net/bridge/br_fdb.c:109,
this is because in Andrei's case, a spin_bug() was already triggered
before this, therefore the debug_locks is turned off, lockdep_is_held()
is no longer accurate after that. We should use lockdep_assert_held_once()
instead of lockdep_is_held() to respect debug_locks.
Fixes: 410b3d48f5111 ("bridge: fdb: add proper lock checks in searching functions")
Reported-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bridge/br_fdb.c | 2 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 9 |
2 files changed, 1 insertions, 10 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 4f598dc2d9168..6e08b7199dd74 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -106,7 +106,7 @@ static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br, struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; - WARN_ON_ONCE(!br_hash_lock_held(br)); + lockdep_assert_held_once(&br->hash_lock); rcu_read_lock(); fdb = fdb_find_rcu(head, addr, vid); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 2288fca7756c5..61368186edea5 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -531,15 +531,6 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid); -static inline bool br_hash_lock_held(struct net_bridge *br) -{ -#ifdef CONFIG_LOCKDEP - return lockdep_is_held(&br->hash_lock); -#else - return true; -#endif -} - /* br_forward.c */ enum br_pkt_type { BR_PKT_UNICAST, |