cfg80211: rcu-ify rdev and wdev
Future code will need to look up rdev and wdev within atomic sections, but currently we need to lock a mutex for such lookups. Change the list handling for both to be RCU-safe so that we can look them up in rcu sections instead in the future. Signed-off-by: NJohannes Berg <johannes@sipsolutions.net> Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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