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-rw-r--r--include/linux/timex.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h
index 74fdd07d3792..7e050a2cc35b 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -260,6 +260,29 @@ extern long pps_calcnt; /* calibration intervals */
extern long pps_errcnt; /* calibration errors */
extern long pps_stbcnt; /* stability limit exceeded */
+/**
+ * ntp_clear - Clears the NTP state variables
+ *
+ * Must be called while holding a write on the xtime_lock
+ */
+static inline void ntp_clear(void)
+{
+ time_adjust = 0; /* stop active adjtime() */
+ time_status |= STA_UNSYNC;
+ time_maxerror = NTP_PHASE_LIMIT;
+ time_esterror = NTP_PHASE_LIMIT;
+}
+
+/**
+ * ntp_synced - Returns 1 if the NTP status is not UNSYNC
+ *
+ */
+static inline int ntp_synced(void)
+{
+ return !(time_status & STA_UNSYNC);
+}
+
+
#ifdef CONFIG_TIME_INTERPOLATION
#define TIME_SOURCE_CPU 0
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