From 00b30cf04a775b5292ab704f782394e36e25617d Mon Sep 17 00:00:00 2001
From: "cpw@sgi.com" <cpw@sgi.com>
Date: Tue, 21 Jun 2011 07:21:26 -0500
Subject: [PATCH] x86, UV: Fix smp_processor_id() use in a preemptable region

Fix a call by tunables_write() to smp_processor_id() within a
preemptable region.

Call get_cpu()/put_cpu() around the region where the returned
cpu number is actually used, which makes it non-preemptable.

A DEBUG_PREEMPT warning is prevented.

UV does not support cpu hotplug yet, but this is a step toward
that ability as well.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20110621122242.086384966@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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