From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Wed, 22 Oct 2008 14:00:09 +0000 (+0400)
Subject: x86: do_boot_cpu - check if we have ESR register
X-Git-Tag: v2.6.28-rc1~12^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db96b0a0e4158806fcf03945a870f9320e6bac9b;p=pandora-kernel.git

x86: do_boot_cpu - check if we have ESR register

Impact: fix APIC IRQ irregularities on certain older boxes

We should touch the APIC ESR register if only we have it.

The patch fixes the problem mentioned by Max Kellermann:

	http://lkml.org/lkml/2008/10/17/147

Bisected-by: Max Kellermann <mk@cm4all.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
[ mingo@elte.hu: build fix ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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