K 10
svn:author
V 7
delphij
K 8
svn:date
V 27
2009-10-11T07:03:56.746919Z
K 7
svn:log
V 195
Add locking around access to parent node, and bail out when the parent
node is already freed rather than panicking the system.

PR:		kern/122038
Submitted by:	gk
Tested by:	pho
MFC after:	1 week

END