| #ifndef ACPI_BUTTON_H | 
 | #define ACPI_BUTTON_H | 
 |  | 
 | #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 */ |