5042 stop using deprecated atomic functions Reviewed by: Dan McDonald <danmcd@omniti.com> Approved by: Robert Mustacchi <rm@joyent.com>
6664275 robust locks are not so robust after all
6568230 mutex_unlock() can modify freed memory
6559990 user-level read/write locks should be much faster 6550115 Signal delivery causes unbounded priority inversions
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