K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2019-09-01T02:52:00.675257Z
K 7
svn:log
V 334
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

END