linux-kernel - [PATCH] cpufreq: Add dummy cpufreq_cpu_get/put for CONFIG_CPU

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Message-Id: <1381222571-20317-1-git-send-email-daniel.vetter@ffwll.ch>
Date:	Tue,  8 Oct 2013 10:56:11 +0200
From:	Daniel Vetter <daniel.vetter@...ll.ch>
To:	Intel Graphics Development <intel-gfx@...ts.freedesktop.org>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	kbuild test robot <fengguang.wu@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] cpufreq: Add dummy cpufreq_cpu_get/put for CONFIG_CPU_FREQ=n

The drm/i915 driver wants to adjust it's own power policies using the
cpu policies as a guideline (we can implicitly boost the cpus through
the gpus on some platforms). To avoid a dreaded select (since a
depends will leave users wondering where where their driver has gone
too) add dummy functions.

Reported-by: kbuild test robot <fengguang.wu@...el.com>
Cc: kbuild test robot <fengguang.wu@...el.com>
Cc: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: Viresh Kumar <viresh.kumar@...aro.org>
Cc: cpufreq@...r.kernel.org
Cc: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
---
A quick ack for merging this this through the drm-intel tree is
probably the simplest way forward.
-Daniel
---
 include/linux/cpufreq.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index fcabc42..5ad9a4e 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -93,8 +93,16 @@ struct cpufreq_policy {
 #define CPUFREQ_SHARED_TYPE_ALL	 (2) /* All dependent CPUs should set freq */
 #define CPUFREQ_SHARED_TYPE_ANY	 (3) /* Freq can be set from any dependent CPU*/
 
+#ifdef CONFIG_CPU_FREQ
 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
 void cpufreq_cpu_put(struct cpufreq_policy *policy);
+#else
+static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
+{
+	return NULL;
+}
+static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { }
+#endif
 
 static inline bool policy_is_shared(struct cpufreq_policy *policy)
 {
-- 
1.8.4.rc3

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