So switch to kref instead of using the self-made, atomic_t-based implementation.
Signed-off-by: Sven Eckelmann <[email protected]> --- net/batman-adv/originator.c | 28 +++++++++++++++++++++------- net/batman-adv/originator.h | 2 +- net/batman-adv/translation-table.c | 10 +++++----- net/batman-adv/types.h | 2 +- 4 files changed, 28 insertions(+), 14 deletions(-) diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index a6eac81..a7b70b5 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -82,7 +82,7 @@ batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, if (tmp->vid != vid) continue; - if (!atomic_inc_not_zero(&tmp->refcount)) + if (!kref_get_unless_zero(&tmp->refcount)) continue; vlan = tmp; @@ -123,7 +123,8 @@ batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, if (!vlan) goto out; - atomic_set(&vlan->refcount, 2); + kref_init(&vlan->refcount); + kref_get(&vlan->refcount); vlan->vid = vid; hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list); @@ -135,14 +136,27 @@ out: } /** - * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free + * batadv_orig_node_vlan_release - release originator-vlan object from lists + * and queue for free after rcu grace period + * * @ref: kref pointer of the originator-vlan object + */ +static void batadv_orig_node_vlan_release(struct kref *ref) +{ + struct batadv_orig_node_vlan *orig_vlan; + + orig_vlan = container_of(ref, struct batadv_orig_node_vlan, refcount); + + kfree_rcu(orig_vlan, rcu); +} + +/** + * batadv_orig_node_vlan_put - decrement the refcounter and possibly free * the originator-vlan object * @orig_vlan: the originator-vlan object to release */ -void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) +void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan *orig_vlan) { - if (atomic_dec_and_test(&orig_vlan->refcount)) - kfree_rcu(orig_vlan, rcu); + kref_put(&orig_vlan->refcount, batadv_orig_node_vlan_release); } int batadv_originator_init(struct batadv_priv *bat_priv) @@ -883,7 +897,7 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, * Immediately release vlan since it is not needed anymore in this * context */ - batadv_orig_node_vlan_free_ref(vlan); + batadv_orig_node_vlan_put(vlan); for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { INIT_HLIST_HEAD(&orig_node->fragments[i].head); diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index b0506ba..0bad6cc 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -83,7 +83,7 @@ batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, struct batadv_orig_node_vlan * batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, unsigned short vid); -void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan); +void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan *orig_vlan); /* hashfunction to choose an entry in a hash table of given size * hash algorithm from http://en.wikipedia.org/wiki/Hash_table diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 1ebdcd7..ac66771 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -314,10 +314,10 @@ static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, spin_lock_bh(&orig_node->vlan_list_lock); hlist_del_init_rcu(&vlan->list); spin_unlock_bh(&orig_node->vlan_list_lock); - batadv_orig_node_vlan_free_ref(vlan); + batadv_orig_node_vlan_put(vlan); } - batadv_orig_node_vlan_free_ref(vlan); + batadv_orig_node_vlan_put(vlan); } /** @@ -1614,7 +1614,7 @@ batadv_tt_global_print_entry(struct batadv_priv *bat_priv, ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); - batadv_orig_node_vlan_free_ref(vlan); + batadv_orig_node_vlan_put(vlan); } print_list: @@ -1646,7 +1646,7 @@ print_list: ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); - batadv_orig_node_vlan_free_ref(vlan); + batadv_orig_node_vlan_put(vlan); } } @@ -2465,7 +2465,7 @@ static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, return false; crc = vlan->tt.crc; - batadv_orig_node_vlan_free_ref(vlan); + batadv_orig_node_vlan_put(vlan); if (crc != ntohl(tt_vlan_tmp->crc)) return false; diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index d69be62..441ebd9 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -197,7 +197,7 @@ struct batadv_orig_node_vlan { unsigned short vid; struct batadv_vlan_tt tt; struct hlist_node list; - atomic_t refcount; + struct kref refcount; struct rcu_head rcu; }; -- 2.6.4
