1. 根目录:
2. arch
3. s390
4. include
5. asm
6. vtime.h

#ifndef _S390_VTIME_H
#define _S390_VTIME_H

#define __ARCH_HAS_VTIME_ACCOUNT
#define __ARCH_HAS_VTIME_TASK_SWITCH

#endif /* _S390_VTIME_H */