K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2011-06-13T00:55:29.193218Z
K 7
svn:log
V 431
Add new mutexes - one protecting the sc txqueue slist and one for ath_node

Since ath_node now contains useful data that will be accessed concurrently,
protect it with a mutex.

Migrate the sc->sc_txnodeq out of ATH_LOCK and behind its own lock.

Since the rate control logic uses state in ath_node (ie, "stuff" attached
after it), add some mutexes to the rate control calls.

It's likely the locking isn't completely correct yet.

END