[MIPS] Fix wreckage after removal of tickadj; convert to GENERIC_TIME.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -803,6 +803,10 @@ config GENERIC_CALIBRATE_DELAY
 	bool
 	default y
 
+config GENERIC_TIME
+	bool
+	default y
+
 config SCHED_NO_NO_OMIT_FRAME_POINTER
 	bool
 	default y

arch/mips/dec/time.c

@@ -184,8 +184,6 @@ void __init dec_time_init(void)
 	CMOS_WRITE(RTC_REF_CLCK_32KHZ | (16 - __ffs(HZ)), RTC_REG_A);
 }
 
-EXPORT_SYMBOL(do_settimeofday);
-
 void __init plat_timer_setup(struct irqaction *irq)
 {
 	setup_irq(dec_interrupt[DEC_IRQ_RTC], irq);

arch/mips/kernel/time.c

@@ -149,80 +149,6 @@ void (*mips_timer_ack)(void);
 unsigned int (*mips_hpt_read)(void);
 void (*mips_hpt_init)(unsigned int);
 
-
-/*
- * This version of gettimeofday has microsecond resolution and better than
- * microsecond precision on fast machines with cycle counter.
- */
-void do_gettimeofday(struct timeval *tv)
-{
-	unsigned long seq;
-	unsigned long usec, sec;
-	unsigned long max_ntp_tick;
-
-	do {
-		seq = read_seqbegin(&xtime_lock);
-
-		usec = do_gettimeoffset();
-
-		/*
-		 * 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);
-		}
-
-		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 -= do_gettimeoffset() * NSEC_PER_USEC;
-
-	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);
-
 /*
  * Gettimeoffset routines.  These routines returns the time duration
  * since last timer interrupt in usecs.