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

#ifndef _ASM_X86_DELAY_H
#define _ASM_X86_DELAY_H

#include <asm-generic/delay.h>

void use_tsc_delay(void);

#endif /* _ASM_X86_DELAY_H */