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yaml
---
r: 350165
b: refs/heads/master
c: 05ad717
h: refs/heads/master
i:
  350163: 585ca72
v: v3
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Feng Tang authored and John Stultz committed Jan 16, 2013
1 parent ff9f09b commit 7678443
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Showing 4 changed files with 13 additions and 1 deletion.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 9ecf37eb7a81e3295a1b274eafb6f83d7d2cabf0
refs/heads/master: 05ad717c77b1b8e98a1dd768c3700036d634629e
2 changes: 2 additions & 0 deletions trunk/drivers/rtc/Kconfig
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Expand Up @@ -20,6 +20,7 @@ if RTC_CLASS
config RTC_HCTOSYS
bool "Set system time from RTC on startup and resume"
default y
depends on !HAS_PERSISTENT_CLOCK
help
If you say yes here, the system time (wall clock) will be set using
the value read from a specified RTC device. This is useful to avoid
Expand All @@ -28,6 +29,7 @@ config RTC_HCTOSYS
config RTC_SYSTOHC
bool "Set the RTC time based on NTP synchronization"
default y
depends on !HAS_PERSISTENT_CLOCK
help
If you say yes here, the system time (wall clock) will be stored
in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
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5 changes: 5 additions & 0 deletions trunk/include/linux/time.h
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Expand Up @@ -116,10 +116,15 @@ static inline bool timespec_valid_strict(const struct timespec *ts)
}

extern bool persistent_clock_exist;

#ifdef CONFIG_HAS_PERSISTENT_CLOCK
#define has_persistent_clock() true
#else
static inline bool has_persistent_clock(void)
{
return persistent_clock_exist;
}
#endif

extern void read_persistent_clock(struct timespec *ts);
extern void read_boot_clock(struct timespec *ts);
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5 changes: 5 additions & 0 deletions trunk/kernel/time/Kconfig
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Expand Up @@ -12,6 +12,11 @@ config CLOCKSOURCE_WATCHDOG
config ARCH_CLOCKSOURCE_DATA
bool

# Platforms has a persistent clock
config HAS_PERSISTENT_CLOCK
bool
default n

# Timekeeping vsyscall support
config GENERIC_TIME_VSYSCALL
bool
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