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Commit 3f73fe9f authored by Bob Copeland's avatar Bob Copeland Committed by Johannes Berg
Browse files

mac80211: mesh: drop constant field mean_chain_len 



The mean_chain_len field in struct mesh_table is copied whenever a
new mesh table is allocated, but only ever has the value 2 and is
never otherwise updated, so just remove it and use the related
define instead.

Signed-off-by: default avatarBob Copeland <me@bobcopeland.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 0ef049dc

net/mac80211/mesh.h

+0 −3
Original line number Diff line number Diff line
@@ -137,8 +137,6 @@ struct mesh_path { 
 * @copy_node: function to copy nodes of the table

 * @size_order: determines size of the table, there will be 2^size_order hash

 *	buckets

 * @mean_chain_len: maximum average length for the hash buckets' list, if it is

 *	reached, the table will grow

 * @known_gates: list of known mesh gates and their mpaths by the station. The

 * gate's mpath may or may not be resolved and active.

 *
@@ -154,7 +152,6 @@ struct mesh_table { 
	void (*free_node) (struct hlist_node *p, bool free_leafs);

	int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);

	int size_order;

	int mean_chain_len;

	struct hlist_head *known_gates;

	spinlock_t gates_lock;

net/mac80211/mesh_pathtbl.c

+3 −6
Original line number Diff line number Diff line
@@ -160,11 +160,10 @@ static int mesh_table_grow(struct mesh_table *oldtbl, 
	int i;



	if (atomic_read(&oldtbl->entries)

			< oldtbl->mean_chain_len * (oldtbl->hash_mask + 1))

			< MEAN_CHAIN_LEN * (oldtbl->hash_mask + 1))

		return -EAGAIN;



	newtbl->free_node = oldtbl->free_node;

	newtbl->mean_chain_len = oldtbl->mean_chain_len;

	newtbl->copy_node = oldtbl->copy_node;

	newtbl->known_gates = oldtbl->known_gates;

	atomic_set(&newtbl->entries, atomic_read(&oldtbl->entries));
@@ -585,7 +584,7 @@ struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata, 


	hlist_add_head_rcu(&new_node->list, bucket);

	if (atomic_inc_return(&tbl->entries) >=

	    tbl->mean_chain_len * (tbl->hash_mask + 1))

	    MEAN_CHAIN_LEN * (tbl->hash_mask + 1))

		grow = 1;



	mesh_paths_generation++;
@@ -714,7 +713,7 @@ int mpp_path_add(struct ieee80211_sub_if_data *sdata, 


	hlist_add_head_rcu(&new_node->list, bucket);

	if (atomic_inc_return(&tbl->entries) >=

	    tbl->mean_chain_len * (tbl->hash_mask + 1))

	    MEAN_CHAIN_LEN * (tbl->hash_mask + 1))

		grow = 1;



	spin_unlock(&tbl->hashwlock[hash_idx]);
@@ -1076,7 +1075,6 @@ int mesh_pathtbl_init(void) 
		return -ENOMEM;

	tbl_path->free_node = &mesh_path_node_free;

	tbl_path->copy_node = &mesh_path_node_copy;

	tbl_path->mean_chain_len = MEAN_CHAIN_LEN;

	tbl_path->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC);

	if (!tbl_path->known_gates) {

		ret = -ENOMEM;
@@ -1092,7 +1090,6 @@ int mesh_pathtbl_init(void) 
	}

	tbl_mpp->free_node = &mesh_path_node_free;

	tbl_mpp->copy_node = &mesh_path_node_copy;

	tbl_mpp->mean_chain_len = MEAN_CHAIN_LEN;

	tbl_mpp->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC);

	if (!tbl_mpp->known_gates) {

		ret = -ENOMEM;