From: Mohan Kumar M <mohan@in.ibm.com>
Date: Wed, 21 Mar 2007 05:51:32 +0000 (+0530)
Subject: [POWERPC] Avoid hypervisor statistics calculation in real mode
X-Git-Tag: v2.6.21-rc5~31^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4aea36b7956eeebfc56314ce0944db1441255ce;p=pandora-kernel.git

[POWERPC] Avoid hypervisor statistics calculation in real mode

kexec invokes plpar_hcall hypervisor call in real mode.  plpar_hcall
refers to per cpu variables for accounting hypervisor statistics.
These variables may not be in the RMO region, so accesses to them
in real mode may result in a data storage exception.

This fixes this problem by using a new plpar_hcall_raw function which
does not update the hypervisor call statistics.  Thanks to Anton for
suggesting this idea.

Signed-off-by: Mohan Kumar M <mohan@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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