From: Tim Blechmann <tim@klingt.org>
Date: Thu, 19 Feb 2009 16:34:03 +0000 (+0100)
Subject: x86: oprofile: don't set counter width from cpuid on Core2
X-Git-Tag: v2.6.29-rc7~3^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=780eef9492b16a1543a3b2ae9f9526a735fc9856;p=pandora-kernel.git

x86: oprofile: don't set counter width from cpuid on Core2

Impact: fix stuck NMIs and non-working oprofile on certain CPUs

Resetting the counter width of the performance counters on Intel's
Core2 CPUs, breaks the delivery of NMIs, when running in x86_64 mode.

This should fix bug #12395:

  http://bugzilla.kernel.org/show_bug.cgi?id=12395

Signed-off-by: Tim Blechmann <tim@klingt.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
LKML-Reference: <20090303100412.GC10085@erda.amd.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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