K 10
svn:author
V 3
kan
K 8
svn:date
V 27
2005-09-15T19:21:26.000000Z
K 7
svn:log
V 168
Handle a race condition where NULLFS vnode can be cleaned while threads
can still be asleep waiting for lowervp lock.

Tested by:	kkenn
Discussed with: ssouhlal, jeffr

END