Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / include / linux / timex.h

diff --git a/include/linux/timex.h b/include/linux/timex.h
index 74fdd07..03914b7 100644 (file)
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -97,37 +97,10 @@
 
 #define MAXPHASE 512000L        /* max phase error (us) */
 #define MAXFREQ (512L << SHIFT_USEC)  /* max frequency error (ppm) */
-#define MAXTIME (200L << PPS_AVG) /* max PPS error (jitter) (200 us) */
 #define MINSEC 16L              /* min interval between updates (s) */
 #define MAXSEC 1200L            /* max interval between updates (s) */
 #define        NTP_PHASE_LIMIT (MAXPHASE << 5) /* beyond max. dispersion */
 
-/*
- * The following defines are used only if a pulse-per-second (PPS)
- * signal is available and connected via a modem control lead, such as
- * produced by the optional ppsclock feature incorporated in the Sun
- * asynch driver. They establish the design parameters of the frequency-
- * lock loop used to discipline the CPU clock oscillator to the PPS
- * signal.
- *
- * PPS_AVG is the averaging factor for the frequency loop, as well as
- * the time and frequency dispersion.
- *
- * PPS_SHIFT and PPS_SHIFTMAX specify the minimum and maximum
- * calibration intervals, respectively, in seconds as a power of two.
- *
- * PPS_VALID is the maximum interval before the PPS signal is considered
- * invalid and protocol updates used directly instead.
- *
- * MAXGLITCH is the maximum interval before a time offset of more than
- * MAXTIME is believed.
- */
-#define PPS_AVG 2              /* pps averaging constant (shift) */
-#define PPS_SHIFT 2            /* min interval duration (s) (shift) */
-#define PPS_SHIFTMAX 8         /* max interval duration (s) (shift) */
-#define PPS_VALID 120          /* pps signal watchdog max (s) */
-#define MAXGLITCH 30           /* pps signal glitch max (s) */
-
 /*
  * syscall interface - used (mainly by NTP daemon)
  * to discipline kernel clock oscillator
@@ -246,19 +219,35 @@ extern long time_reftime; /* time at last adjustment (s) */
 extern long time_adjust;       /* The amount of adjtime left */
 extern long time_next_adjust;  /* Value for time_adjust at next tick */
 
-/* interface variables pps->timer interrupt */
-extern long pps_offset;                /* pps time offset (us) */
-extern long pps_jitter;                /* time dispersion (jitter) (us) */
-extern long pps_freq;          /* frequency offset (scaled ppm) */
-extern long pps_stabil;                /* frequency dispersion (scaled ppm) */
-extern long pps_valid;         /* pps signal watchdog counter */
+/**
+ * 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);
+}
+
+/* Required to safely shift negative values */
+#define shift_right(x, s) ({   \
+       __typeof__(x) __x = (x);        \
+       __typeof__(s) __s = (s);        \
+       __x < 0 ? -(-__x >> __s) : __x >> __s;  \
+})
 
-/* interface variables pps->adjtimex */
-extern int pps_shift;          /* interval duration (s) (shift) */
-extern long pps_jitcnt;                /* jitter limit exceeded */
-extern long pps_calcnt;                /* calibration intervals */
-extern long pps_errcnt;                /* calibration errors */
-extern long pps_stbcnt;                /* stability limit exceeded */
 
 #ifdef CONFIG_TIME_INTERPOLATION
 
@@ -315,6 +304,11 @@ time_interpolator_reset(void)
 
 #endif /* !CONFIG_TIME_INTERPOLATION */
 
+/* Returns how long ticks are at present, in ns / 2^(SHIFT_SCALE-10). */
+extern u64 current_tick_length(void);
+
+extern int do_adjtimex(struct timex *);
+
 #endif /* KERNEL */
 
 #endif /* LINUX_TIMEX_H */