K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2017-09-14T08:47:06.421194Z
K 7
svn:log
V 414
dounmount: do not release the mount point's reference on the covered vnode

As long as mnt_ref is not zero there can be a consumer that might try
to access mnt_vnodecovered.  For this reason the covered vnode must not
be freed until mnt_ref goes to zero.
So, move the release of the covered vnode to vfs_mount_destroy.

Reviewed by:	kib
MFC after:	3 weeks
Differential Revision: https://reviews.freebsd.org/D12329

END