1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h
index fb86963859c7..25247220b4b7 100644
--- a/include/linux/timekeeper_internal.h
+++ b/include/linux/timekeeper_internal.h
@@ -49,6 +49,8 @@ struct tk_read_base {
  * @offs_boot:          Offset clock monotonic -> clock boottime
  * @offs_tai:           Offset clock monotonic -> clock tai
  * @tai_offset:         The current UTC to TAI offset in seconds
+ * @clock_was_set_seq:  The sequence number of clock was set events
+ * @next_leap_ktime:    CLOCK_MONOTONIC time value of a pending leap-second
  * @raw_time:           Monotonic raw base time in timespec64 format
  * @cycle_interval:     Number of clock cycles in one NTP interval
  * @xtime_interval:     Number of clock shifted nano seconds in one NTP
@@ -60,6 +62,9 @@ struct tk_read_base {
  *                      shifted nano seconds.
  * @ntp_error_shift:    Shift conversion between clock shifted nano seconds and
  *                      ntp shifted nano seconds.
+ * @last_warning:       Warning ratelimiter (DEBUG_TIMEKEEPING)
+ * @underflow_seen:     Underflow warning flag (DEBUG_TIMEKEEPING)
+ * @overflow_seen:      Overflow warning flag (DEBUG_TIMEKEEPING)
  *
  * Note: For timespec(64) based interfaces wall_to_monotonic is what
  * we need to add to xtime (or xtime corrected for sub jiffie times)
@@ -85,6 +90,8 @@ struct timekeeper {
         ktime_t                 offs_boot;
         ktime_t                 offs_tai;
         s32                     tai_offset;
+        unsigned int            clock_was_set_seq;
+        ktime_t                 next_leap_ktime;
         struct timespec64       raw_time;
 
         /* The following members are for timekeeping internal use */
@@ -104,6 +111,18 @@ struct timekeeper {
         s64                     ntp_error;
         u32                     ntp_error_shift;
         u32                     ntp_err_mult;
+#ifdef CONFIG_DEBUG_TIMEKEEPING
+        long                    last_warning;
+        /*
+         * These simple flag variables are managed
+         * without locks, which is racy, but they are
+         * ok since we don't really care about being
+         * super precise about how many events were
+         * seen, just that a problem was observed.
+         */
+        int                     underflow_seen;
+        int                     overflow_seen;
+#endif
 };
 
 #ifdef CONFIG_GENERIC_TIME_VSYSCALL