The biggest improvement is using RCU, this will allow checking
against the regdomain from any context and makes the wiphy's
regd pointer safe to use for drivers. It also simplifies the
locking since cfg80211_mutex isn't needed any more for those
things, only for wdev iteration/access.
Over my previous [RFC] series, the changes are:
old 18: dropped, will be part of VHT changes
new 01: fixing an array access bug
new 02: clean up the intersect more, in particular
don't memset all the time
new 20: fix a memory leak
new 21: don't let cfg80211_regdomain pointer be NULL
new 22/23: RCU
new 24: use IS_ERR macro family
johannes
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