ACPI: make ACPI button funcs no-ops if not built in
Yakui pointed out that we don't properly no-op the ACPI button routines
if the button driver isn't built in. This will cause problems if ACPI
is disabled, so provide stub functions in that case.
Reported-by: ykzhao <yakui.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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 */