b79aa45e0e
mutexes but now are converted to epoch(9) use thread-private epoch_tracker. Embedding tracker into ifnet(9) or ifnet derived structures creates a non reentrable function, that will fail miserably if called simultaneously from two different contexts. A thread private tracker will provide a single tracker that would allow to call these functions safely. It doesn't allow nested call, but this is not expected from compatibility KPIs. Reviewed by: markj