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>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 79a2281678bf..0d7b08db8e56 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -871,8 +871,10 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
          * and we need some headroom for passing the frame to monitor
          * interfaces, but never both at the same time.
          */
+#ifndef __CHECKER__
         BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
                         sizeof(struct ieee80211_tx_status_rtap_hdr));
+#endif
         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
                                    sizeof(struct ieee80211_tx_status_rtap_hdr));