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authorSatyam Sharma <satyam@infradead.org>2007-10-02 13:28:15 -0700
committerDave Jones <davej@redhat.com>2007-10-04 18:40:57 -0400
commit6070b5de50ab5e3f810628a9cbb04deecf30a85f (patch)
tree008d9a6df181b99a46bda05d0194c2dde0c88ded /include/linux/cpufreq.h
parentdd184a01b8ece6bac2f7a63de99a4a4d29552746 (diff)
downloadlwn-6070b5de50ab5e3f810628a9cbb04deecf30a85f.tar.gz
lwn-6070b5de50ab5e3f810628a9cbb04deecf30a85f.zip
[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@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'include/linux/cpufreq.h')
-rw-r--r--include/linux/cpufreq.h18
1 files changed, 15 insertions, 3 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 450a841b5892..23932d7741a9 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -32,12 +32,24 @@
* CPUFREQ NOTIFIER INTERFACE *
*********************************************************************/
-int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
-
#define CPUFREQ_TRANSITION_NOTIFIER (0)
#define CPUFREQ_POLICY_NOTIFIER (1)
+#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 /* CONFIG_CPU_FREQ */
+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 /* CONFIG_CPU_FREQ */
/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
* within the limits is used. If (cpufreq_driver->setpolicy> exists, these