From: Jason Wang <jasowang@redhat.com>
Date: Fri, 31 Aug 2012 05:32:44 +0000 (+0800)
Subject: hv: vmbus_drv: detect hyperv through x86_hyper
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~76^2~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1f94ea8181a9305a5d5cf635a6a4e9ac8ee3d2c3;p=pandora-kernel.git

hv: vmbus_drv: detect hyperv through x86_hyper

There are two reasons we need to use x86_hyper instead of
query_hypervisor_presence():

- Not only hyperv but also other hypervisors such as kvm would set
  X86_FEATURE_HYTPERVISOR, so query_hypervisor_presence() will return true even
  in kvm. This may cause extra delay of 5 seconds before failing the probing in
  kvm guest.
- The hypervisor has been detected in init_hypervisor(), so no need to do the
  work again.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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