K 10
svn:author
V 7
delphij
K 8
svn:date
V 27
2015-12-29T07:54:55.619803Z
K 7
svn:log
V 615
hyperv: vmbus: remove the per-channel control_work_queue

Now vmbus_channel_on_offer() -> vmbus_channel_process_offer() can
safely run on the global hv_vmbus_g_connection.work_queue now.

We remove the per-channel control_work_queue to achieve the proper
serialization of the message handling.

I removed the bogus TODO in vmbus_channel_on_offer(): a vmbus offer
can only come from the parent partition, i.e., the host.

PR:		kern/205156
Submitted by:	Dexuan Cui <decui microsoft com>
Reviewed by:	Howard Su <howard0su gmail com>, delphij
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D4597

END