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| author | Bob Copeland <me@bobcopeland.com> | 2016-03-18 22:11:30 -0400 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2016-04-05 21:34:51 +0200 |
| commit | 18b27ff7d2e232b0f07f2f51aa8052ff2a617908 (patch) | |
| tree | 78c8d16a5ef5430a1eaf062b6ec296fbca033972 /net/mac80211 | |
| parent | 47a0489ce1e518f4936c7fedb93b3d2abd7ccd2e (diff) | |
| download | linux-stable-18b27ff7d2e232b0f07f2f51aa8052ff2a617908.tar.gz linux-stable-18b27ff7d2e232b0f07f2f51aa8052ff2a617908.tar.bz2 linux-stable-18b27ff7d2e232b0f07f2f51aa8052ff2a617908.zip | |
mac80211: mesh: embed gates hlist head directly
Since we have converted the mesh path tables to rhashtable, we are
no longer swapping out the entire mesh_pathtbl pointer with RCU.
As a result, we no longer need indirection to the hlist head for
the gates list and can simply embed it, saving a pair of
pointer-sized allocations.
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/mesh.h | 2 | ||||
| -rw-r--r-- | net/mac80211/mesh_pathtbl.c | 18 |
2 files changed, 5 insertions, 15 deletions
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index bc3f9a32b5a4..46b540a25d9d 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -134,7 +134,7 @@ struct mesh_path { */ struct mesh_table { atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */ - struct hlist_head *known_gates; + struct hlist_head known_gates; spinlock_t gates_lock; struct rhashtable rhead; diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index 1c9412a29ca3..6db2ddfa0695 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -58,12 +58,7 @@ static struct mesh_table *mesh_table_alloc(void) if (!newtbl) return NULL; - newtbl->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC); - if (!newtbl->known_gates) { - kfree(newtbl); - return NULL; - } - INIT_HLIST_HEAD(newtbl->known_gates); + INIT_HLIST_HEAD(&newtbl->known_gates); atomic_set(&newtbl->entries, 0); spin_lock_init(&newtbl->gates_lock); @@ -341,7 +336,7 @@ int mesh_path_add_gate(struct mesh_path *mpath) mpath->sdata->u.mesh.num_gates++; spin_lock(&tbl->gates_lock); - hlist_add_head_rcu(&mpath->gate_list, tbl->known_gates); + hlist_add_head_rcu(&mpath->gate_list, &tbl->known_gates); spin_unlock(&tbl->gates_lock); spin_unlock_bh(&mpath->state_lock); @@ -759,16 +754,11 @@ int mesh_path_send_to_gates(struct mesh_path *mpath) struct mesh_path *from_mpath = mpath; struct mesh_path *gate; bool copy = false; - struct hlist_head *known_gates; tbl = sdata->u.mesh.mesh_paths; - known_gates = tbl->known_gates; - - if (!known_gates) - return -EHOSTUNREACH; rcu_read_lock(); - hlist_for_each_entry_rcu(gate, known_gates, gate_list) { + hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) { if (gate->flags & MESH_PATH_ACTIVE) { mpath_dbg(sdata, "Forwarding to %pM\n", gate->dst); mesh_path_move_to_queue(gate, from_mpath, copy); @@ -781,7 +771,7 @@ int mesh_path_send_to_gates(struct mesh_path *mpath) } } - hlist_for_each_entry_rcu(gate, known_gates, gate_list) { + hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) { mpath_dbg(sdata, "Sending to %pM\n", gate->dst); mesh_path_tx_pending(gate); } |