2 files changed, 21 insertions, 6 deletions

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 30b6de0d977c..c6d6400ee137 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -339,6 +339,7 @@ void clockevents_config_and_register(struct clock_event_device *dev,
         clockevents_config(dev, freq);
         clockevents_register_device(dev);
 }
+EXPORT_SYMBOL_GPL(clockevents_config_and_register);
 
 /**
  * clockevents_update_freq - Update frequency and reprogram a clock event device.
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index cbc6acb0db3f..8ed934601587 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -135,6 +135,20 @@ static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock)
 }
 
 /* Timekeeper helper functions. */
+
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+u32 (*arch_gettimeoffset)(void);
+
+u32 get_arch_timeoffset(void)
+{
+        if (likely(arch_gettimeoffset))
+                return arch_gettimeoffset();
+        return 0;
+}
+#else
+static inline u32 get_arch_timeoffset(void) { return 0; }
+#endif
+
 static inline s64 timekeeping_get_ns(struct timekeeper *tk)
 {
         cycle_t cycle_now, cycle_delta;
@@ -151,8 +165,8 @@ static inline s64 timekeeping_get_ns(struct timekeeper *tk)
         nsec = cycle_delta * tk->mult + tk->xtime_nsec;
         nsec >>= tk->shift;
 
-        /* If arch requires, add in gettimeoffset() */
-        return nsec + arch_gettimeoffset();
+        /* If arch requires, add in get_arch_timeoffset() */
+        return nsec + get_arch_timeoffset();
 }
 
 static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk)
@@ -171,8 +185,8 @@ static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk)
         /* convert delta to nanoseconds. */
         nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
 
-        /* If arch requires, add in gettimeoffset() */
-        return nsec + arch_gettimeoffset();
+        /* If arch requires, add in get_arch_timeoffset() */
+        return nsec + get_arch_timeoffset();
 }
 
 static RAW_NOTIFIER_HEAD(pvclock_gtod_chain);
@@ -254,8 +268,8 @@ static void timekeeping_forward_now(struct timekeeper *tk)
 
         tk->xtime_nsec += cycle_delta * tk->mult;
 
-        /* If arch requires, add in gettimeoffset() */
-        tk->xtime_nsec += (u64)arch_gettimeoffset() << tk->shift;
+        /* If arch requires, add in get_arch_timeoffset() */
+        tk->xtime_nsec += (u64)get_arch_timeoffset() << tk->shift;
 
         tk_normalize_xtime(tk);