[PATCH] Locking fixes for vr(4)

[John Baldwin]

- Fix vr(4) to use callout_*() so that its callout runs without Giant.
- Fix locking in detach.

Please test, thanks!

http://www.FreeBSD.org/~jhb/patches/vr_locking.patch

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org