From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Mon, 8 Jun 2009 17:17:31 +0000 (-0400)
Subject: [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site)
X-Git-Tag: v2.6.32-rc1~648^2~3
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=395913d0b1db37092ea3d9d69b832183b1dd84c5;p=pandora-kernel.git

[CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site)

remove rwsem lock from CPUFREQ_GOV_STOP call (second call site)

commit	42a06f2166f2f6f7bf04f32b4e823eacdceafdc9

Missed a call site for CPUFREQ_GOV_STOP to remove the rwlock taken around the
teardown. To make a long story short, the rwlock write-lock causes a circular
dependency with cancel_delayed_work_sync(), because the timer handler takes the
read lock.

Note that all callers to __cpufreq_set_policy are taking the rwsem. All sysfs
callers (writers) hold the write rwsem at the earliest sysfs calling stage.

However, the rwlock write-lock is not needed upon governor stop.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
CC: rjw@sisk.pl
CC: mingo@elte.hu
CC: Shaohua Li <shaohua.li@intel.com>
CC: Pekka Enberg <penberg@cs.helsinki.fi>
CC: Dave Young <hidave.darkstar@gmail.com>
CC: "Rafael J. Wysocki" <rjw@sisk.pl>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: trenn@suse.de
CC: sven.wegener@stealer.net
CC: cpufreq@vger.kernel.org
Signed-off-by: Dave Jones <davej@redhat.com>
---

Reading git-diff-tree failed