[PATCH 10/27] Initialize timehands linkage much earlier.

[Moyano, Gabriel]

From: Konstantin Belousov <k...@freebsd.org>

Reported and tested by: trasz
Sponsored by:   The FreeBSD Foundation
MFC after:      1 week
---
 cpukit/score/src/kern_tc.c | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/cpukit/score/src/kern_tc.c b/cpukit/score/src/kern_tc.c
index 3aa68f7595..0051d49330 100644
--- a/cpukit/score/src/kern_tc.c
+++ b/cpukit/score/src/kern_tc.c
@@ -245,7 +245,8 @@ SYSCTL_INT(_kern_timecounter, OID_AUTO, stepwarnings, 
CTLFLAG_RW,
     &timestepwarnings, 0, "Log time steps");
 
 static int timehands_count = 2;
-SYSCTL_INT(_kern_timecounter, OID_AUTO, timehands_count, CTLFLAG_RDTUN,
+SYSCTL_INT(_kern_timecounter, OID_AUTO, timehands_count,
+    CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
     &timehands_count, 0, "Count of timehands in rotation");
 
 struct bintime bt_timethreshold;
@@ -2242,12 +2243,30 @@ done:
        return (0);
 }
 
+/* Set up the requested number of timehands. */
 static void
-inittimecounter(void *dummy)
+inittimehands(void *dummy)
 {
        struct timehands *thp;
+       int i;
+
+       TUNABLE_INT_FETCH("kern.timecounter.timehands_count",
+           &timehands_count);
+       if (timehands_count < 1)
+               timehands_count = 1;
+       if (timehands_count > nitems(ths))
+               timehands_count = nitems(ths);
+       for (i = 1, thp = &ths[0]; i < timehands_count;  thp = &ths[i++])
+               thp->th_next = &ths[i];
+       thp->th_next = &ths[0];
+}
+SYSINIT(timehands, SI_SUB_TUNABLES, SI_ORDER_ANY, inittimehands, NULL);
+
+static void
+inittimecounter(void *dummy)
+{
        u_int p;
-       int i, tick_rate;
+       int tick_rate;
 
        /*
         * Set the initial timeout to
@@ -2274,15 +2293,6 @@ inittimecounter(void *dummy)
        ffclock_init();
 #endif
 
-       /* Set up the requested number of timehands. */
-       if (timehands_count < 1)
-               timehands_count = 1;
-       if (timehands_count > nitems(ths))
-               timehands_count = nitems(ths);
-       for (i = 1, thp = &ths[0]; i < timehands_count;  thp = &ths[i++])
-               thp->th_next = &ths[i];
-       thp->th_next = &ths[0];
-
        /* warm up new timecounter (again) and get rolling. */
        (void)timecounter->tc_get_timecount(timecounter);
        (void)timecounter->tc_get_timecount(timecounter);
-- 
2.17.1

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