1. 根目录:
2. arch
3. x86
4. kernel
5. acpi
6. sleep.h

/*
 *	Variables and functions used by the code in sleep.c
 */

#include <asm/realmode.h>

extern unsigned long saved_video_mode;
extern long saved_magic;

extern int wakeup_pmode_return;

extern u8 wake_sleep_flags;

extern unsigned long acpi_copy_wakeup_routine(unsigned long);
extern void wakeup_long64(void);

extern void do_suspend_lowlevel(void);

extern int x86_acpi_suspend_lowlevel(void);

acpi_status asmlinkage x86_acpi_enter_sleep_state(u8 state);