#ifndef _LINUX_NTP_INTERNAL_H#define _LINUX_NTP_INTERNAL_Hexternvoidntp_init(void);externvoidntp_clear(void);/* Returns how long ticks are at present, in ns / 2^NTP_SCALE_SHIFT. */externu64ntp_tick_length(void);externintsecond_overflow(unsignedlongsecs);externintntp_validate_timex(structtimex*);externint__do_adjtimex(structtimex*,structtimespec*,s32*);externvoid__hardpps(conststructtimespec*,conststructtimespec*);#endif /* _LINUX_NTP_INTERNAL_H */