K 10
svn:author
V 5
trasz
K 8
svn:date
V 27
2009-03-01T15:01:00.805579Z
K 7
svn:log
V 253
MFC r187894.  Note that r188501 should be merged too.

Make sure the cdev doesn't go away while the filesystem is still mounted.
Otherwise dev2udev() could return garbage.

Reviewed by:	kib
Approved by:	rwatson (mentor)
Sponsored by:	FreeBSD Foundation

END