From: Vijaya Kumar K <vijay.kilari@gmail.com>
Date: Wed, 14 Aug 2013 12:28:28 +0000 (+0100)
Subject: ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic
X-Git-Tag: v3.11-rc7~3^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4f9b4fb7a2091eec339413a460b1665758401828;p=pandora-kernel.git

ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic

In case of normal kexec kernel load, all cpu's are offlined
before calling machine_kexec().But in case crash panic cpus
are relaxed in machine_crash_nonpanic_core() SMP function
but not offlined.

When crash kernel is loaded with kexec and on panic trigger
machine_kexec() checks for number of cpus online.
If more than one cpu is online machine_kexec() fails to load
with below error

kexec: error: multiple CPUs still online

In machine_crash_nonpanic_core() SMP function, offline CPU
before cpu_relax

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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