extern u8 sleep_states[]; extern int acpi_suspend (u32 state); extern void acpi_enable_wakeup_device_prep(u8 sleep_state); extern void acpi_enable_wakeup_device(u8 sleep_state); extern void acpi_disable_wakeup_device(u8 sleep_state); extern struct list_head acpi_wakeup_device_list; extern struct mutex acpi_device_lock;