Konstantin Belousov f71d08566c Limit scope of the optimization in r306608 to dounmount() caller only.
Other uses of cache_purgevfs() do rely on the cache purge for correct
operations, when paths are invalidated without unmount.

Reported and tested by:	jkim
Discussed with:	mjg
Sponsored by:	The FreeBSD Foundation
2016-10-07 11:38:28 +00:00
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