#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);#elsestatic 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 */