From: Carsten Otte <cotte@de.ibm.com>
Date: Sun, 30 Oct 2011 14:17:01 +0000 (+0100)
Subject: [S390] fix list corruption in gmap reverse mapping
X-Git-Tag: v3.2-rc1~109^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc772456ac9b460693492b3a3d89e8c81eda5874;p=pandora-kernel.git

[S390] fix list corruption in gmap reverse mapping

This introduces locking via mm->page_table_lock to protect
the rmap list for guest mappings from being corrupted by concurrent
operations.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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