K 10 svn:author V 6 adrian K 8 svn:date V 27 2011-10-02T08:48:47.972583Z K 7 svn:log V 210 Add the PCU mutex. This mutex may eventually be used to protect access to the PCU. The reference driver (and thus ath9k) serialises access to the PCU (TX, RX, reset/channel change, interrupts) through a lock. END