Latest current -CURRENT (rev 255904) panics with "device hyperv" on XenServer 6.2

[Shanker Balan]

Helo,

Now that XENHVM has been merged into the GENERIC kernel, I recompiled todays -CURRENT (rev 255904)
and hit the following panic. It seeems to be HyperV related.

GENERIC without "device hyperv" works properly. The hypervisor is XenServer 6.2.

# HyperV drivers
device          hyperv          # HyperV drivers 

Panic screenshots with backtrace at http://imgur.com/cZsDsKE&VCkh4VS

Regards.
@shankerbalan