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ntp: let update_persistent_clock() sleep

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This is a change that makes the 11-minute RTC update be run in the process
context.  This is so that update_persistent_clock() can sleep, which may
be required for certain types of RTC hardware -- most notably I2C devices.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Maciej W. Rozycki 2008-09-22 14:42:40 -07:00 committed by Thomas Gleixner
parent 77dd3b3bd2
commit eb3f938fd6
1 changed files with 6 additions and 6 deletions
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12
kernel/time/ntp.c
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@ -10,13 +10,13 @@
#include <linux/mm.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/timex.h>
#include <linux/jiffies.h>
#include <linux/hrtimer.h>
#include <linux/capability.h>
#include <linux/math64.h>
#include <linux/clocksource.h>
#include <linux/workqueue.h>
#include <asm/timex.h>
/*
@ -218,11 +218,11 @@ void second_overflow(void)
/* Disable the cmos update - used by virtualization and embedded */
int no_sync_cmos_clock __read_mostly;
static void sync_cmos_clock(unsigned long dummy);
static void sync_cmos_clock(struct work_struct *work);
static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
static DECLARE_DELAYED_WORK(sync_cmos_work, sync_cmos_clock);
static void sync_cmos_clock(unsigned long dummy)
static void sync_cmos_clock(struct work_struct *work)
{
struct timespec now, next;
int fail = 1;
@ -258,13 +258,13 @@ static void sync_cmos_clock(unsigned long dummy)
next.tv_sec++;
next.tv_nsec -= NSEC_PER_SEC;
}
mod_timer(&sync_cmos_timer, jiffies + timespec_to_jiffies(&next));
schedule_delayed_work(&sync_cmos_work, timespec_to_jiffies(&next));
}
static void notify_cmos_timer(void)
{
if (!no_sync_cmos_clock)
mod_timer(&sync_cmos_timer, jiffies + 1);
schedule_delayed_work(&sync_cmos_work, 0);
}
#else