Mateusz Guzik e0f4540a2a nullfs: reduce areas protected by vnode interlock in null_lock
Similarly to the other routine stop taking the interlock for the lower
vnode. The interlock for nullfs vnode is still taken to ensure
stability of ->v_data.

Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D21480
2019-09-01 02:52:00 +00:00
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