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Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().

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This avoids use of the kernel-internal "xtime" variable directly outside
of the actual time-related functions.  Instead, use the helper functions
that we already have available to us.

This doesn't actually change any behaviour, but this will allow us to
fix the fact that "xtime" isn't updated very often with CONFIG_NO_HZ
(because much of the realtime information is maintained as separate
offsets to 'xtime'), which has caused interfaces that use xtime directly
to get a time that is out of sync with the real-time clock by up to a
third of a second or so.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
john stultz 2007-07-24 17:47:43 -07:00 • committed by Linus Torvalds
parent 0de085bb47
commit 2c6b47de17
13 changed files with 34 additions and 33 deletions
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5
drivers/rtc/class.c
View file

@ -46,6 +46,7 @@ static int rtc_suspend(struct device *dev, pm_message_t mesg)
{
struct rtc_device *rtc = to_rtc_device(dev);
struct rtc_time tm;
struct timespec ts = current_kernel_time();
if (strncmp(rtc->dev.bus_id,
CONFIG_RTC_HCTOSYS_DEVICE,
@ -57,8 +58,8 @@ static int rtc_suspend(struct device *dev, pm_message_t mesg)
/* RTC precision is 1 second; adjust delta for avg 1/2 sec err */
set_normalized_timespec(&delta,
xtime.tv_sec - oldtime,
xtime.tv_nsec - (NSEC_PER_SEC >> 1));
ts.tv_sec - oldtime,
ts.tv_nsec - (NSEC_PER_SEC >> 1));
return 0;
}