From: Nathan Zimmer <nzimmer@sgi.com>
Date: Fri, 22 Feb 2013 16:24:34 +0000 (+0000)
Subject: cpufreq: Convert the cpufreq_driver_lock to a rwlock
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~92^2~1^2~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d1857a1b987ef874aeb4b99c9c385fa5645bf61;p=pandora-kernel.git

cpufreq: Convert the cpufreq_driver_lock to a rwlock

This eliminates the contention I am seeing in __cpufreq_cpu_get.
It also nicely stages the lock to be replaced by the rcu.

Signed-off-by: Nathan Zimmer <nzimmer@sgi.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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