Mateusz Guzik 4840711516 unionfs: stop passing LK_INTERLOCK to VOP_UNLOCK
This is part of the preparation to remove flags argument from VOP_UNLOCK.
Also has a side effect of fixing stacking on top of nullfs broken by r351472.

Reported by:	cy
Sponsored by:	The FreeBSD Foundation
2019-08-27 20:51:17 +00:00
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