K 10
svn:author
V 4
kato
K 8
svn:date
V 27
1997-04-26T04:09:40.000000Z
K 7
svn:log
V 406
Do not clear UN_ULOCK in certain case.

Our vput calls vm_object_deallocate() --> vm_object_terminate().  The
vm_object_terminate() calls vn_lock(), since UN_LOCKED has been
already cleared in union_unlock().  Then, union_lock locks upper vnode
when UN_ULOCK is not set.  The upper vnode is not unlocked when
UN_KLOCK is set in union_unlock(), thus, union_lock tries to lock
locked vnode and we get panic.

END