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ntp: handle leap second via timer

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Remove the leap second handling from second_overflow(), which doesn't have to
check for it every second anymore.  With CONFIG_NO_HZ this also makes sure the
leap second is handled close to the full second.  Additionally this makes it
possible to abort a leap second properly by resetting the STA_INS/STA_DEL
status bits.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Zippel
2008-05-01 04:34:41 -07:00
committed by Linus Torvalds
parent 8383c42399
commit 7dffa3c673
4 changed files with 96 additions and 46 deletions
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4
kernel/time/timekeeping.c
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@@ -53,7 +53,7 @@ void update_xtime_cache(u64 nsec)
timespec_add_ns(&xtime_cache, nsec);
}
static struct clocksource *clock; /* pointer to current clocksource */
struct clocksource *clock;
#ifdef CONFIG_GENERIC_TIME
@@ -246,7 +246,7 @@ void __init timekeeping_init(void)
write_seqlock_irqsave(&xtime_lock, flags);
ntp_clear();
ntp_init();
clock = clocksource_get_next();
clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);