Commit ebd6c171 authored by John Stultz's avatar John Stultz Committed by Linus Torvalds
Browse files

[PATCH] FRV: Use the generic time stuff for FRV 



Use the generic time stuff for FRV.

Signed-off-by: default avatarJohn Stultz <johnstul@us.ibm.com>
Signed-Off-By: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b4a22834

arch/frv/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -29,6 +29,10 @@ config GENERIC_HARDIRQS 
	bool

	default n



config GENERIC_TIME

	bool

	default y



config TIME_LOW_RES

	bool

	default y

arch/frv/kernel/time.c

+0 −81
Original line number Diff line number Diff line
@@ -32,8 +32,6 @@ 


#define TICK_SIZE (tick_nsec / 1000)



extern unsigned long wall_jiffies;



unsigned long __nongprelbss __clkin_clock_speed_HZ;

unsigned long __nongprelbss __ext_bus_clock_speed_HZ;

unsigned long __nongprelbss __res_bus_clock_speed_HZ;
@@ -144,85 +142,6 @@ void time_init(void) 
	time_divisor_init();

}



/*

 * This version of gettimeofday has near microsecond resolution.

 */

void do_gettimeofday(struct timeval *tv)

{

	unsigned long seq;

	unsigned long usec, sec;

	unsigned long max_ntp_tick;



	do {

		unsigned long lost;



		seq = read_seqbegin(&xtime_lock);



		usec = 0;

		lost = jiffies - wall_jiffies;



		/*

		 * If time_adjust is negative then NTP is slowing the clock

		 * so make sure not to go into next possible interval.

		 * Better to lose some accuracy than have time go backwards..

		 */

		if (unlikely(time_adjust < 0)) {

			max_ntp_tick = (USEC_PER_SEC / HZ) - tickadj;

			usec = min(usec, max_ntp_tick);



			if (lost)

				usec += lost * max_ntp_tick;

		}

		else if (unlikely(lost))

			usec += lost * (USEC_PER_SEC / HZ);



		sec = xtime.tv_sec;

		usec += (xtime.tv_nsec / 1000);

	} while (read_seqretry(&xtime_lock, seq));



	while (usec >= 1000000) {

		usec -= 1000000;

		sec++;

	}



	tv->tv_sec = sec;

	tv->tv_usec = usec;

}



EXPORT_SYMBOL(do_gettimeofday);



int do_settimeofday(struct timespec *tv)

{

	time_t wtm_sec, sec = tv->tv_sec;

	long wtm_nsec, nsec = tv->tv_nsec;



	if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)

		return -EINVAL;



	write_seqlock_irq(&xtime_lock);

	/*

	 * This is revolting. We need to set "xtime" correctly. However, the

	 * value in this location is the value at the most recent update of

	 * wall time.  Discover what correction gettimeofday() would have

	 * made, and then undo it!

	 */

	nsec -= 0 * NSEC_PER_USEC;

	nsec -= (jiffies - wall_jiffies) * TICK_NSEC;



	wtm_sec  = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);

	wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);



	set_normalized_timespec(&xtime, sec, nsec);

	set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);



	ntp_clear();

	write_sequnlock_irq(&xtime_lock);

	clock_was_set();

	return 0;

}



EXPORT_SYMBOL(do_settimeofday);



/*

 * Scheduler clock - returns current time in nanosec units.

 */