linux-kernel - [PATCH 03/14] cpufreq: Add support for per-policy driver data

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Message-Id: <0614df495e361dd23ebe2d4e4ee3d40cb23948da.1404231535.git.viresh.kumar@linaro.org>
Date:	Tue,  1 Jul 2014 22:02:32 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	rjw@...ysocki.net, shawn.guo@...aro.org
Cc:	linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, arvind.chauhan@....com,
	sboyd@...eaurora.org, linux-arm-msm@...r.kernel.org,
	spk.linux@...il.com, thomas.ab@...sung.com, nm@...com,
	t.figa@...sung.com, Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH 03/14] cpufreq: Add support for per-policy driver data

Drivers supporting multiple clusters or multiple 'struct cpufreq_policy'
instances may need to keep per-policy data. If the core doesn't support them,
they might do it in the most unoptimized way: 'per-cpu' data.

This patch adds another field in 'struct cpufreq_policy': 'driver_data'. It
isn't accessed by core and is for driver's internal use.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 include/linux/cpufreq.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index ec4112d..d4b1108 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -112,6 +112,9 @@ struct cpufreq_policy {
 	spinlock_t		transition_lock;
 	wait_queue_head_t	transition_wait;
 	struct task_struct	*transition_task; /* Task which is doing the transition */
+
+	/* For cpufreq driver's internal use */
+	void			*driver_data;
 };
 
 /* Only for ACPI */
-- 
2.0.0.rc2

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