K 10
svn:author
V 8
mckusick
K 8
svn:date
V 27
2012-01-11T19:12:29.679474Z
K 7
svn:log
V 328
MFC: 226265

When unmounting a filesystem always wait for the vfs_busy lock to clear
so that if no vnodes in the filesystem are actively in use the unmount
will succeed rather than failing with EBUSY.

Reported by: Garrett Cooper
Reviewed by: Attilio Rao and Kostik Belousov
Tested by:   Garrett Cooper
PR:          kern/161016

END