linux-kernel - [PATCH] cpufreq: Implement !CONFIG_CPU_FREQ stub for cpufreq_unregister

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Date:	Thu, 23 Aug 2007 08:33:41 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Dave Jones <davej@...emonkey.org.uk>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] cpufreq: Implement !CONFIG_CPU_FREQ stub for
 cpufreq_unregister_notifier()


Callsites such as arch/powerpc/oprofile/op_model_cell.c are having to
open-code #ifdef CONFIG_CPU_FREQ only to be able to get at the full
definition of cpufreq_unregister_notifier(), because no empty stub is
available for the !CONFIG_CPU_FREQ case. Let's provide one, to be able
to remove such #ifdef's from the rest of the kernel tree -- those will
come in a subsequent patch.

Signed-off-by: Satyam Sharma <satyam@...radead.org>

---

 include/linux/cpufreq.h |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 963051a..6e2ebd8 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -34,14 +34,19 @@
 
 #ifdef CONFIG_CPU_FREQ
 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
+int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
 #else
 static inline int cpufreq_register_notifier(struct notifier_block *nb,
 						unsigned int list)
 {
 	return 0;
 }
+static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
+						unsigned int list)
+{
+	return 0;
+}
 #endif
-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
 
 #define CPUFREQ_TRANSITION_NOTIFIER	(0)
 #define CPUFREQ_POLICY_NOTIFIER		(1)
-
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