[PATCH 0/4] OPP usage fixes for RCU locking

From: Nishanth Menon
Date: Fri Jan 18 2013 - 14:53:17 EST


Hi,
Despite being documented in function documentation and in
Documentation/power/opp.txt, many of the users of OPP APIs
dont honor RCU lock usage appropriately.

This recently appeared in IRC discussion earlier today [1].
I did an audit of current usage and the following series
is a result of this.

NOTE:
1. The patch "PM / devfreq: exynos4_bus: honor RCU lock usage" has only
been build tested as I dont have an exynos platform to try it on. I have
tried to make it as least intrusive as possible and at least reviewed
to ensure I haven't screwed anything up.

Other than this, I have added appropriate tested by information in requisite
patches.

Series is based off: v3.8-rc4 tag
Also available in the following location[2]:
https://github.com/nmenon/linux-2.6-playground branch: post/pm/opp-fixes-v1

Nishanth Menon (4):
cpufreq: OMAP: use RCU locks around usage of OPP
cpufreq: cpufreq-cpu0: use RCU locks around usage of OPP
PM / devfreq: add locking documentation for recommend_opp
PM / devfreq: exynos4_bus: honor RCU lock usage

drivers/cpufreq/cpufreq-cpu0.c | 5 +++
drivers/cpufreq/omap-cpufreq.c | 3 ++
drivers/devfreq/devfreq.c | 5 +++
drivers/devfreq/exynos4_bus.c | 94 ++++++++++++++++++++++++++++------------
4 files changed, 80 insertions(+), 27 deletions(-)

[1] http://www.beagleboard.org/irclogs/index.php?date=2013-01-18#T14:14:07
[2] https://github.com/nmenon/linux-2.6-playground/commits/post/pm/opp-fixes-v1

Regards,
Nishanth Menon
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