From: Andi Kleen <ak@suse.de>
Date: Mon, 26 Jun 2006 11:59:17 +0000 (+0200)
Subject: [PATCH] x86_64: Fix fast check in safe_smp_processor_id
X-Git-Tag: v2.6.18-rc1~612^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75bd665cc9f4d0f67164d9145e446ae554d4ed3f;p=pandora-kernel.git

[PATCH] x86_64: Fix fast check in safe_smp_processor_id

The APIC ID returned by hard_smp_processor_id can be beyond
NR_CPUS and then overflow the x86_cpu_to_apic[] array.

Add a check for overflow. If it happens then the slow loop below
will catch.

Bug pointed out by Doug Thompson

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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