So switch to kref instead of using the self-made, atomic_t-based implementation.
Signed-off-by: Sven Eckelmann <[email protected]> --- net/batman-adv/bridge_loop_avoidance.c | 36 ++++++++++++++++++---------------- net/batman-adv/types.h | 2 +- 2 files changed, 20 insertions(+), 18 deletions(-) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 4e5538a..3315b27 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -169,27 +169,28 @@ static void batadv_backbone_gw_put(struct batadv_bla_backbone_gw *backbone_gw) } /** - * batadv_claim_free_rcu - finally deinitialize the claim - * @rcu: rcu pointer within the claim structure + * batadv_claim_release - release claim from lists and queue for free after rcu + * grace period + * * @ref: kref pointer of the claim */ -static void batadv_claim_free_rcu(struct rcu_head *rcu) +static void batadv_claim_release(struct kref *ref) { struct batadv_bla_claim *claim; - claim = container_of(rcu, struct batadv_bla_claim, rcu); + claim = container_of(ref, struct batadv_bla_claim, refcount); batadv_backbone_gw_put(claim->backbone_gw); - kfree(claim); + kfree_rcu(claim, rcu); } /** - * batadv_claim_free_rcu - free a claim + * batadv_claim_put - decrement the claim refcounter and possibly + * release it * @claim: claim to be free'd */ -static void batadv_claim_free_ref(struct batadv_bla_claim *claim) +static void batadv_claim_put(struct batadv_bla_claim *claim) { - if (atomic_dec_and_test(&claim->refcount)) - call_rcu(&claim->rcu, batadv_claim_free_rcu); + kref_put(&claim->refcount, batadv_claim_release); } /** @@ -220,7 +221,7 @@ static struct batadv_bla_claim if (!batadv_compare_claim(&claim->hash_entry, data)) continue; - if (!atomic_inc_not_zero(&claim->refcount)) + if (!kref_get_unless_zero(&claim->refcount)) continue; claim_tmp = claim; @@ -303,7 +304,7 @@ batadv_bla_del_backbone_claims(struct batadv_bla_backbone_gw *backbone_gw) if (claim->backbone_gw != backbone_gw) continue; - batadv_claim_free_ref(claim); + batadv_claim_put(claim); hlist_del_rcu(&claim->hash_entry); } spin_unlock_bh(list_lock); @@ -652,7 +653,8 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv, claim->lasttime = jiffies; claim->backbone_gw = backbone_gw; - atomic_set(&claim->refcount, 2); + kref_init(&claim->refcount); + kref_get(&claim->refcount); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_add_claim(): adding new entry %pM, vid %d to hash ...\n", mac, BATADV_PRINT_VID(vid)); @@ -691,7 +693,7 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv, backbone_gw->lasttime = jiffies; claim_free_ref: - batadv_claim_free_ref(claim); + batadv_claim_put(claim); } /** @@ -716,14 +718,14 @@ static void batadv_bla_del_claim(struct batadv_priv *bat_priv, batadv_hash_remove(bat_priv->bla.claim_hash, batadv_compare_claim, batadv_choose_claim, claim); - batadv_claim_free_ref(claim); /* reference from the hash is gone */ + batadv_claim_put(claim); /* reference from the hash is gone */ spin_lock_bh(&claim->backbone_gw->crc_lock); claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN); spin_unlock_bh(&claim->backbone_gw->crc_lock); /* don't need the reference from hash_find() anymore */ - batadv_claim_free_ref(claim); + batadv_claim_put(claim); } /** @@ -1691,7 +1693,7 @@ out: if (primary_if) batadv_hardif_free_ref(primary_if); if (claim) - batadv_claim_free_ref(claim); + batadv_claim_put(claim); return ret; } @@ -1780,7 +1782,7 @@ out: if (primary_if) batadv_hardif_free_ref(primary_if); if (claim) - batadv_claim_free_ref(claim); + batadv_claim_put(claim); return ret; } diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 098ec7f..c56b99c 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -951,7 +951,7 @@ struct batadv_bla_claim { unsigned long lasttime; struct hlist_node hash_entry; struct rcu_head rcu; - atomic_t refcount; + struct kref refcount; }; #endif -- 2.6.4
