time, drivers/rtc: Don't bother with rtc_resume() for the nonstop clocksource
If a system does not provide a persistent_clock(), the time
will be updated on resume by rtc_resume(). With the addition
of the non-stop clocksources for suspend timing, those systems
set the time on resume in timekeeping_resume(), but may not
provide a valid persistent_clock().
This results in the rtc_resume() logic thinking no one has set
the time and it then will over-write the suspend time again,
which is not necessary and only increases clock error.
So, fix this for rtc_resume().
This patch also improves the name of persistent_clock_exist to
make it more grammatical.
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1427945681-29972-19-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 7a2369d..99176af 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -248,6 +248,9 @@
/*
* RTC specific
*/
+extern bool timekeeping_rtc_skipsuspend(void);
+extern bool timekeeping_rtc_skipresume(void);
+
extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);
/*
@@ -259,14 +262,8 @@
/*
* Persistent clock related interfaces
*/
-extern bool persistent_clock_exist;
extern int persistent_clock_is_local;
-static inline bool has_persistent_clock(void)
-{
- return persistent_clock_exist;
-}
-
extern void read_persistent_clock(struct timespec *ts);
extern void read_persistent_clock64(struct timespec64 *ts);
extern void read_boot_clock(struct timespec *ts);