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| author | David S. Miller <davem@davemloft.net> | 2011-05-02 15:04:46 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-05-02 15:04:46 -0700 |
| commit | dcfd9cdc1222f14d6180514e533289493a0716fb (patch) | |
| tree | 8a60386e7e55c44fc08c02506380989a3c83a166 /net/batman-adv/hard-interface.h | |
| parent | 5615787257742aab42ecf17c11e3244d9536a48d (diff) | |
| parent | 32ae9b221e788413ce68feaae2ca39e406211a0a (diff) | |
| download | linux-next-dcfd9cdc1222f14d6180514e533289493a0716fb.tar.gz | |
Merge branch 'batman-adv/next' of git://git.open-mesh.org/ecsv/linux-merge
Diffstat (limited to 'net/batman-adv/hard-interface.h')
| -rw-r--r-- | net/batman-adv/hard-interface.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h index a9ddf36e51c8..64265991460b 100644 --- a/net/batman-adv/hard-interface.h +++ b/net/batman-adv/hard-interface.h @@ -45,4 +45,22 @@ static inline void hardif_free_ref(struct hard_iface *hard_iface) call_rcu(&hard_iface->rcu, hardif_free_rcu); } +static inline struct hard_iface *primary_if_get_selected( + struct bat_priv *bat_priv) +{ + struct hard_iface *hard_iface; + + rcu_read_lock(); + hard_iface = rcu_dereference(bat_priv->primary_if); + if (!hard_iface) + goto out; + + if (!atomic_inc_not_zero(&hard_iface->refcount)) + hard_iface = NULL; + +out: + rcu_read_unlock(); + return hard_iface; +} + #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ |