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

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2006-10-02 16:54:48 +01:00
parent 3f82164034
commit 8db0201026
3 changed files with 4 additions and 76 deletions
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4
arch/mips/Kconfig
View file

@ -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

2
arch/mips/dec/time.c
View file

@ -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);

74
arch/mips/kernel/time.c
View file

@ -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.