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There's no reason for drivers to be able to access the cfg80211 internal cookie counter; move it out of the wiphy into the rdev structure. While at it, also make it never assign 0 as a cookie (we consider that invalid in some places), and warn if we manage to do that for some reason (wrapping is not likely to happen with a u64.) Signed-off-by: Johannes Berg <johannes.berg@intel.com>