linux-kernel - [PATCH 1/2] cpufreq: Add support for per-policy driver data

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Date:	Wed, 25 Jun 2014 14:12:28 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	rjw@...ysocki.net, sboyd@...eaurora.org, shawn.guo@...aro.org
Cc:	linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, arvind.chauhan@....com,
	mturquette@...aro.org, linux-arm-kernel@...ts.infradead.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 1/2] cpufreq: Add support for per-policy driver data

Drivers supporting multiple clusters or multiple 'struct cpufreq_policy'
instances may need to keep some 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 completely 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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