From: Yinghai Lu <yinghai@kernel.org>
Date: Tue, 7 Dec 2010 08:59:49 +0000 (-0800)
Subject: x86, ioapic: Avoid writing io_apic id if already correct
X-Git-Tag: v2.6.38-rc1~458^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=60d79fd99ff3b9c692b260a4d53a203f537c052a;p=pandora-kernel.git

x86, ioapic: Avoid writing io_apic id if already correct

For 32bit mptable path, setup_ids_from_mpc() always writes the io_apic
id register, even there is no change needed.

Skip the write, when readout and mptable match.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
LKML-Reference: <4CFDF785.7010401@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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