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-rw-r--r--kernel/time/timekeeping.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index f682091fa890..4ad79f6bdec6 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -217,6 +217,7 @@ static void change_clocksource(void)
}
#else
static inline void change_clocksource(void) { }
+static inline s64 __get_nsec_offset(void) { return 0; }
#endif
/**
@@ -280,6 +281,8 @@ void __init timekeeping_init(void)
static int timekeeping_suspended;
/* time in seconds when suspend began */
static unsigned long timekeeping_suspend_time;
+/* xtime offset when we went into suspend */
+static s64 timekeeping_suspend_nsecs;
/**
* timekeeping_resume - Resumes the generic timekeeping subsystem.
@@ -305,6 +308,8 @@ static int timekeeping_resume(struct sys_device *dev)
wall_to_monotonic.tv_sec -= sleep_length;
total_sleep_time += sleep_length;
}
+ /* Make sure that we have the correct xtime reference */
+ timespec_add_ns(&xtime, timekeeping_suspend_nsecs);
/* re-base the last cycle value */
clock->cycle_last = clocksource_read(clock);
clock->error = 0;
@@ -328,6 +333,8 @@ static int timekeeping_suspend(struct sys_device *dev, pm_message_t state)
timekeeping_suspend_time = read_persistent_clock();
write_seqlock_irqsave(&xtime_lock, flags);
+ /* Get the current xtime offset */
+ timekeeping_suspend_nsecs = __get_nsec_offset();
timekeeping_suspended = 1;
write_sequnlock_irqrestore(&xtime_lock, flags);