From: Alok Kataria <akataria@vmware.com>
Date: Mon, 3 Nov 2008 19:31:28 +0000 (-0800)
Subject: x86: VMware: Fix vmware_get_tsc code
X-Git-Tag: v2.6.29-rc1~587^2~4^8~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bdbfe99916398dbb28d83833cc04757110f2738;p=pandora-kernel.git

x86: VMware: Fix vmware_get_tsc code

Impact: Fix possible failure to calibrate the TSC on Vmware near 4 GHz

The current version of the code to get the tsc frequency from
the VMware hypervisor, will be broken on processor with frequency
(4G-1) HZ, because on such processors eax will have UINT_MAX
and that would be legitimate.
We instead check that EBX did change to decide if we were able to
read the frequency from the hypervisor.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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