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authorJohannes Berg <johannes.berg@intel.com>2011-05-13 16:15:49 +0400
committerJohn W. Linville <linville@tuxdriver.com>2011-05-16 22:10:41 +0400
commit40b275b69ee660274b77fb612b0db31fd282fc3f (patch)
tree29a4f82a44a12edcf9db5de6a3c6df9615a5799e /net/mac80211/debugfs_key.c
parentec034b208dc8aa5dc73ec46c3f27e34c5efbf113 (diff)
downloadlinux-40b275b69ee660274b77fb612b0db31fd282fc3f.tar.xz
mac80211: sparse RCU annotations
This adds sparse RCU annotations to most of mac80211, only the mesh code remains to be done. Due the the previous patches, the annotations are pretty simple. The only thing that this actually changes is removing the RCU usage of key->sta in debugfs since this pointer isn't actually an RCU-managed pointer (it only has a single assignment done before the key even goes live). As that is otherwise harmless, I decided to make it part of this patch. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/debugfs_key.c')
-rw-r--r--net/mac80211/debugfs_key.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index f7ef3477c24a..33c58b85c911 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -241,16 +241,12 @@ void ieee80211_debugfs_key_add(struct ieee80211_key *key)
if (!key->debugfs.dir)
return;
- rcu_read_lock();
- sta = rcu_dereference(key->sta);
- if (sta)
+ sta = key->sta;
+ if (sta) {
sprintf(buf, "../../stations/%pM", sta->sta.addr);
- rcu_read_unlock();
-
- /* using sta as a boolean is fine outside RCU lock */
- if (sta)
key->debugfs.stalink =
debugfs_create_symlink("station", key->debugfs.dir, buf);
+ }
DEBUGFS_ADD(keylen);
DEBUGFS_ADD(flags);
@@ -286,7 +282,8 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
lockdep_assert_held(&sdata->local->key_mtx);
if (sdata->default_unicast_key) {
- key = sdata->default_unicast_key;
+ key = key_mtx_dereference(sdata->local,
+ sdata->default_unicast_key);
sprintf(buf, "../keys/%d", key->debugfs.cnt);
sdata->debugfs.default_unicast_key =
debugfs_create_symlink("default_unicast_key",
@@ -297,7 +294,8 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
}
if (sdata->default_multicast_key) {
- key = sdata->default_multicast_key;
+ key = key_mtx_dereference(sdata->local,
+ sdata->default_multicast_key);
sprintf(buf, "../keys/%d", key->debugfs.cnt);
sdata->debugfs.default_multicast_key =
debugfs_create_symlink("default_multicast_key",
@@ -316,9 +314,8 @@ void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
if (!sdata->debugfs.dir)
return;
- /* this is running under the key lock */
-
- key = sdata->default_mgmt_key;
+ key = key_mtx_dereference(sdata->local,
+ sdata->default_mgmt_key);
if (key) {
sprintf(buf, "../keys/%d", key->debugfs.cnt);
sdata->debugfs.default_mgmt_key =