From: Prarit Bhargava <prarit@redhat.com>
Date: Wed, 12 Nov 2008 18:35:00 +0000 (-0500)
Subject: x86: warn of incorrect cpu_khz on AMD systems
X-Git-Tag: v2.6.29-rc1~587^2~4^6~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8652cb4b0d87accbe78725fd2a13be2787059649;p=pandora-kernel.git

x86: warn of incorrect cpu_khz on AMD systems

Impact: add debug check

If none of the perfctrs are free when calculating cpu_khz we default to
using ctr 3 (ie, we just choose 3).  This may lead to an incorrect tsc
freq value which can cause the system to be unstable.

To aid in future debugging, WARN the user of a potential problem.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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