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batman-adv: convert bat_priv->tt.req_list to hlist

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Since the list's tail is never accessed using a double linked list head
wastes memory.

Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
This commit is contained in:
Marek Lindner 2015-06-28 22:16:06 +08:00 committed by Antonio Quartulli
parent 0b8336f5fc
commit 7c26a53ba5
3 changed files with 19 additions and 16 deletions
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2
net/batman-adv/main.c
View File

@ -148,7 +148,7 @@ int batadv_mesh_init(struct net_device *soft_iface)
INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv6_list);
#endif
INIT_LIST_HEAD(&bat_priv->tt.changes_list);
INIT_LIST_HEAD(&bat_priv->tt.req_list);
INIT_HLIST_HEAD(&bat_priv->tt.req_list);
INIT_LIST_HEAD(&bat_priv->tt.roam_list);
#ifdef CONFIG_BATMAN_ADV_MCAST
INIT_HLIST_HEAD(&bat_priv->mcast.mla_list);

29
net/batman-adv/translation-table.c
View File

@ -2224,12 +2224,13 @@ static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv,
static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
{
struct batadv_tt_req_node *node, *safe;
struct batadv_tt_req_node *node;
struct hlist_node *safe;
spin_lock_bh(&bat_priv->tt.req_list_lock);
list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
list_del_init(&node->list);
hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
hlist_del_init(&node->list);
kfree(node);
}
@ -2259,13 +2260,14 @@ static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
static void batadv_tt_req_purge(struct batadv_priv *bat_priv)
{
struct batadv_tt_req_node *node, *safe;
struct batadv_tt_req_node *node;
struct hlist_node *safe;
spin_lock_bh(&bat_priv->tt.req_list_lock);
list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
if (batadv_has_timed_out(node->issued_at,
BATADV_TT_REQUEST_TIMEOUT)) {
list_del_init(&node->list);
hlist_del_init(&node->list);
kfree(node);
}
}
@ -2287,7 +2289,7 @@ batadv_tt_req_node_new(struct batadv_priv *bat_priv,
struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
spin_lock_bh(&bat_priv->tt.req_list_lock);
list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) {
if (batadv_compare_eth(tt_req_node_tmp, orig_node) &&
!batadv_has_timed_out(tt_req_node_tmp->issued_at,
BATADV_TT_REQUEST_TIMEOUT))
@ -2301,7 +2303,7 @@ batadv_tt_req_node_new(struct batadv_priv *bat_priv,
ether_addr_copy(tt_req_node->addr, orig_node->orig);
tt_req_node->issued_at = jiffies;
list_add(&tt_req_node->list, &bat_priv->tt.req_list);
hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list);
unlock:
spin_unlock_bh(&bat_priv->tt.req_list_lock);
return tt_req_node;
@ -2552,8 +2554,8 @@ out:
batadv_hardif_free_ref(primary_if);
if (ret && tt_req_node) {
spin_lock_bh(&bat_priv->tt.req_list_lock);
/* list_del_init() verifies tt_req_node still is in the list */
list_del_init(&tt_req_node->list);
/* hlist_del_init() verifies tt_req_node still is in the list */
hlist_del_init(&tt_req_node->list);
spin_unlock_bh(&bat_priv->tt.req_list_lock);
kfree(tt_req_node);
}
@ -2949,7 +2951,8 @@ static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
struct batadv_tvlv_tt_data *tt_data,
u8 *resp_src, u16 num_entries)
{
struct batadv_tt_req_node *node, *safe;
struct batadv_tt_req_node *node;
struct hlist_node *safe;
struct batadv_orig_node *orig_node = NULL;
struct batadv_tvlv_tt_change *tt_change;
u8 *tvlv_ptr = (u8 *)tt_data;
@ -2987,10 +2990,10 @@ static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
/* Delete the tt_req_node from pending tt_requests list */
spin_lock_bh(&bat_priv->tt.req_list_lock);
list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
if (!batadv_compare_eth(node->addr, resp_src))
continue;
list_del_init(&node->list);
hlist_del_init(&node->list);
kfree(node);
}

4
net/batman-adv/types.h
View File

@ -537,7 +537,7 @@ struct batadv_priv_tt {
struct list_head changes_list;
struct batadv_hashtable *local_hash;
struct batadv_hashtable *global_hash;
struct list_head req_list;
struct hlist_head req_list;
struct list_head roam_list;
spinlock_t changes_list_lock; /* protects changes */
spinlock_t req_list_lock; /* protects req_list */
@ -1006,7 +1006,7 @@ struct batadv_tt_change_node {
struct batadv_tt_req_node {
u8 addr[ETH_ALEN];
unsigned long issued_at;
struct list_head list;
struct hlist_node list;
};
/**