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ACPI: make ACPI button funcs no-ops if not built in

Message ID 20090915165724.4e4a1229@jbarnes-g45 (mailing list archive)
State RFC, archived
Headers show

Commit Message

Jesse Barnes Sept. 15, 2009, 11:57 p.m. UTC 
On Fri, 11 Sep 2009 09:02:02 +0800
ykzhao <yakui.zhao@intel.com> wrote:
> > +#ifndef ACPI_BUTTON_H
> > +#define ACPI_BUTTON_H
> It will be better that the function prototype is defined in the
> following:
> 
> #if (defined(CONFIG_ACPI_BUTTON) ||
> defined(CONFIG_ACPI_BUTTON_MODULE)) extern int
> acpi_lid_notifier_register(struct notifier_block *nb); extern int
> acpi_lid_notifier_unregister(struct notifier_block *nb); extern int
> acpi_lid_open(void); #else
> static inline int acpi_lid_notifier_register( ...)  { return 0;}
> static inline int acpi_lid_notifier_unregister(struct notifier_block
> *nb) { return 0; }
> static inline int acpi_lid_open(void) { return 1; }
> #endif

Here you go.
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Patch

diff --git a/include/acpi/button.h b/include/acpi/button.h
index bb643a7..97eea0e 100644
--- a/include/acpi/button.h
+++ b/include/acpi/button.h
@@ -3,8 +3,23 @@ 
 
 #include <linux/notifier.h>
 
+#if defined(CONFIG_ACPI_BUTTON) || defined(CONFIG_ACPI_BUTTON_MODULE)
 extern int acpi_lid_notifier_register(struct notifier_block *nb);
 extern int acpi_lid_notifier_unregister(struct notifier_block *nb);
 extern int acpi_lid_open(void);
+#else
+static inline int acpi_lid_notifier_register(struct notifier_block *nb)
+{
+	return 0;
+}
+static inline int acpi_lid_notifier_unregister(struct notifier_block *nb)
+{
+	return 0;
+}
+static inline int acpi_lid_open(void)
+{
+	return 1;
+}
+#endif /* defined(CONFIG_ACPI_BUTTON) || defined(CONFIG_ACPI_BUTTON_MODULE) */
 
 #endif /* ACPI_BUTTON_H */