2 files changed, 10 insertions, 2 deletions

diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 5047b83483d6..18d27a3f72ca 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -269,6 +269,7 @@ static inline bool has_persistent_clock(void)
 
 extern void read_persistent_clock(struct timespec *ts);
 extern void read_boot_clock(struct timespec *ts);
+extern void read_boot_clock64(struct timespec64 *ts);
 extern int update_persistent_clock(struct timespec now);
 
 
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 5b12292b343a..652e50a9c6ed 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1188,6 +1188,14 @@ void __weak read_boot_clock(struct timespec *ts)
         ts->tv_nsec = 0;
 }
 
+void __weak read_boot_clock64(struct timespec64 *ts64)
+{
+        struct timespec ts;
+
+        read_boot_clock(&ts);
+        *ts64 = timespec_to_timespec64(ts);
+}
+
 /*
  * timekeeping_init - Initializes the clocksource and common timekeeping values
  */
@@ -1209,8 +1217,7 @@ void __init timekeeping_init(void)
         } else if (now.tv_sec || now.tv_nsec)
                 persistent_clock_exist = true;
 
-        read_boot_clock(&ts);
-        boot = timespec_to_timespec64(ts);
+        read_boot_clock64(&boot);
         if (!timespec64_valid_strict(&boot)) {
                 pr_warn("WARNING: Boot clock returned invalid value!\n"
                         "         Check your CMOS/BIOS settings.\n");