From: Andi Kleen <ak@linux.intel.com>
Date: Wed, 23 Dec 2009 20:00:47 +0000 (+0100)
Subject: SYSCTL: Add a mutex to the page_alloc zone order sysctl
X-Git-Tag: v2.6.33-rc2~1^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=443c6f145de813518c36ac6b6e4e08d9445337e7;p=pandora-kernel.git

SYSCTL: Add a mutex to the page_alloc zone order sysctl

The zone list code clearly cannot tolerate concurrent writers (I couldn't
find any locks for that), so simply add a global mutex. No need for RCU
in this case.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
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