K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2018-02-19T08:55:22.891126Z
K 7
svn:log
V 365
relax an assert in zfsctl_snapdir_lookup to match r323578

Since r323578 we may remove the last reference to a covered vnode with
vrele() instead of vput().  So, v_usecount may be decremented before
the vnode is locked and zfsctl_snapdir_lookup may "catch" the vnode
with v_usecount of zero and v_holdcnt of one.

PR:		225795
Reported by:	asomers
MFC after:	1 week

END