1. 根目录:
2. arch
3. x86
4. include
5. asm
6. espfix.h

#ifndef _ASM_X86_ESPFIX_H
#define _ASM_X86_ESPFIX_H

#ifdef CONFIG_X86_64

#include <asm/percpu.h>

DECLARE_PER_CPU_READ_MOSTLY(unsigned long, espfix_stack);
DECLARE_PER_CPU_READ_MOSTLY(unsigned long, espfix_waddr);

extern void init_espfix_bsp(void);
extern void init_espfix_ap(void);

#endif /* CONFIG_X86_64 */

#endif /* _ASM_X86_ESPFIX_H */