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Merge branch 'fortglx/3.9/time' of git://git.linaro.org/people/jstultz/linux into timers/core

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This commit is contained in:
Thomas Gleixner 2013-02-14 19:46:10 +01:00
commit 9f4646d283
3 changed files with 15 additions and 2 deletions
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1
include/linux/time.h
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@ -128,6 +128,7 @@ static inline bool has_persistent_clock(void)
extern void read_persistent_clock(struct timespec *ts);
extern void read_boot_clock(struct timespec *ts);
extern int persistent_clock_is_local;
extern int update_persistent_clock(struct timespec now);
void timekeeping_init(void);
extern int timekeeping_suspended;

8
kernel/time.c
View File

@ -114,6 +114,12 @@ SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv,
return 0;
}
/*
* Indicates if there is an offset between the system clock and the hardware
* clock/persistent clock/rtc.
*/
int persistent_clock_is_local;
/*
* Adjust the time obtained from the CMOS to be UTC time instead of
* local time.
@ -135,6 +141,8 @@ static inline void warp_clock(void)
struct timespec adjust;
adjust = current_kernel_time();
if (sys_tz.tz_minuteswest != 0)
persistent_clock_is_local = 1;
adjust.tv_sec += sys_tz.tz_minuteswest * 60;
do_settimeofday(&adjust);
}

8
kernel/time/ntp.c
View File

@ -511,13 +511,17 @@ static void sync_cmos_clock(struct work_struct *work)
getnstimeofday(&now);
if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec / 2) {
struct timespec adjust = now;
fail = -ENODEV;
if (persistent_clock_is_local)
adjust.tv_sec -= (sys_tz.tz_minuteswest * 60);
#ifdef CONFIG_GENERIC_CMOS_UPDATE
fail = update_persistent_clock(now);
fail = update_persistent_clock(adjust);
#endif
#ifdef CONFIG_RTC_SYSTOHC
if (fail == -ENODEV)
fail = rtc_set_ntp_time(now);
fail = rtc_set_ntp_time(adjust);
#endif
}