K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2012-09-22T17:42:53.929532Z
K 7
svn:log
V 247
zfs: allow a zvol to be used as a pool vdev, again

Do this by checking if spa_namespace_lock is already held and not taking
it again in that case.
Add a comment explaining why that is done and why it is safe.

Reviewed by:	pjd
MFC after:	24 days

END