1. 根目录:
2. arch
3. ia64
4. include
5. asm
6. idle.h

#ifndef _ASM_IA64_IDLE_H
#define _ASM_IA64_IDLE_H

static inline void enter_idle(void) { }
static inline void exit_idle(void) { }

#endif /* _ASM_IA64_IDLE_H */