Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[linux-2.6] / kernel / time / timekeeping.c

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 092a2366b5a905d2fb8347106c08176a7ed81114..a3fa587c350c598063a17c903beeee99fe0f47e0 100644 (file)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -47,7 +47,7 @@ struct timespec wall_to_monotonic __attribute__ ((aligned (16)));
 static unsigned long total_sleep_time;         /* seconds */
 
 static struct timespec xtime_cache __attribute__ ((aligned (16)));
-static inline void update_xtime_cache(u64 nsec)
+void update_xtime_cache(u64 nsec)
 {
        xtime_cache = xtime;
        timespec_add_ns(&xtime_cache, nsec);
@@ -145,6 +145,7 @@ int do_settimeofday(struct timespec *tv)
 
        set_normalized_timespec(&xtime, sec, nsec);
        set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
+       update_xtime_cache(0);
 
        clock->error = 0;
        ntp_clear();
@@ -186,13 +187,16 @@ static void change_clocksource(void)
 
        clock->error = 0;
        clock->xtime_nsec = 0;
-       clocksource_calculate_interval(clock,
-               (unsigned long)(current_tick_length()>>TICK_LENGTH_SHIFT));
+       clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);
 
        tick_clock_notify();
 
+       /*
+        * We're holding xtime lock and waking up klogd would deadlock
+        * us on enqueue.  So no printing!
        printk(KERN_INFO "Time: %s clocksource has been installed.\n",
               clock->name);
+        */
 }
 #else
 static inline void change_clocksource(void) { }
@@ -200,9 +204,9 @@ static inline s64 __get_nsec_offset(void) { return 0; }
 #endif
 
 /**
- * timekeeping_is_continuous - check to see if timekeeping is free running
+ * timekeeping_valid_for_hres - Check if timekeeping is suitable for hres
  */
-int timekeeping_is_continuous(void)
+int timekeeping_valid_for_hres(void)
 {
        unsigned long seq;
        int ret;
@@ -244,16 +248,15 @@ void __init timekeeping_init(void)
        ntp_clear();
 
        clock = clocksource_get_next();
-       clocksource_calculate_interval(clock,
-               (unsigned long)(current_tick_length()>>TICK_LENGTH_SHIFT));
+       clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);
        clock->cycle_last = clocksource_read(clock);
 
        xtime.tv_sec = sec;
        xtime.tv_nsec = 0;
        set_normalized_timespec(&wall_to_monotonic,
                -xtime.tv_sec, -xtime.tv_nsec);
+       update_xtime_cache(0);
        total_sleep_time = 0;
-
        write_sequnlock_irqrestore(&xtime_lock, flags);
 }
 
@@ -290,6 +293,7 @@ static int timekeeping_resume(struct sys_device *dev)
        }
        /* Make sure that we have the correct xtime reference */
        timespec_add_ns(&xtime, timekeeping_suspend_nsecs);
+       update_xtime_cache(0);
        /* re-base the last cycle value */
        clock->cycle_last = clocksource_read(clock);
        clock->error = 0;
@@ -362,7 +366,7 @@ static __always_inline int clocksource_bigadjust(s64 error, s64 *interval,
         * with losing too many ticks, otherwise we would overadjust and
         * produce an even larger error.  The smaller the adjustment the
         * faster we try to adjust for it, as lost ticks can do less harm
-        * here.  This is tuned so that an error of about 1 msec is adusted
+        * here.  This is tuned so that an error of about 1 msec is adjusted
         * within about 1 sec (or 2^20 nsec in 2^SHIFT_HZ ticks).
         */
        error2 = clock->error >> (TICK_LENGTH_SHIFT + 22 - 2 * SHIFT_HZ);