Remove the now unused `lbolt' variable from the kernel.

We used to have a single wait channel inside the kernel which could be
used by threads that just wanted to sleep for some time (the next
second). The old TTY layer was the only piece of code that still used
lbolt, because I already removed the use of lbolt from the NFS clients
and the VFS syncer.

Approved by:	philip

1 files changed, 3 insertions, 15 deletions

diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index ef682f4..9b7804b 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -70,11 +70,9 @@ SYSINIT(synch_setup, SI_SUB_KICK_SCHEDULER, SI_ORDER_FIRST, synch_setup,
     NULL);
 
 int	hogticks;
-int	lbolt;
 static int pause_wchan;
 
 static struct callout loadav_callout;
-static struct callout lbolt_callout;
 
 struct loadavg averunnable =
 	{ {0, 0, 0}, FSCALE };	/* load average, of runnable procs */
@@ -93,7 +91,6 @@ static int      fscale __unused = FSCALE;
 SYSCTL_INT(_kern, OID_AUTO, fscale, CTLFLAG_RD, 0, FSCALE, "");
 
 static void	loadav(void *arg);
-static void	lboltcb(void *arg);
 
 void
 sleepinit(void)
@@ -136,8 +133,8 @@ _sleep(void *ident, struct lock_object *lock, int priority,
 #endif
 	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, lock,
 	    "Sleeping on \"%s\"", wmesg);
-	KASSERT(timo != 0 || mtx_owned(&Giant) || lock != NULL ||
-	    ident == &lbolt, ("sleeping without a lock"));
+	KASSERT(timo != 0 || mtx_owned(&Giant) || lock != NULL,
+	    ("sleeping without a lock"));
 	KASSERT(p != NULL, ("msleep1"));
 	KASSERT(ident != NULL && TD_IS_RUNNING(td), ("msleep"));
 	if (priority & PDROP)
@@ -202,7 +199,7 @@ _sleep(void *ident, struct lock_object *lock, int priority,
 	 * stopped, then td will no longer be on a sleep queue upon
 	 * return from cursig().
 	 */
-	sleepq_add(ident, ident == &lbolt ? NULL : lock, wmesg, flags, 0);
+	sleepq_add(ident, lock, wmesg, flags, 0);
 	if (timo)
 		sleepq_set_timeout(ident, timo);
 	if (lock != NULL && class->lc_flags & LC_SLEEPABLE) {
@@ -515,23 +512,14 @@ loadav(void *arg)
 	    loadav, NULL);
 }
 
-static void
-lboltcb(void *arg)
-{
-	wakeup(&lbolt);
-	callout_reset(&lbolt_callout, hz, lboltcb, NULL);
-}
-
 /* ARGSUSED */
 static void
 synch_setup(void *dummy)
 {
 	callout_init(&loadav_callout, CALLOUT_MPSAFE);
-	callout_init(&lbolt_callout, CALLOUT_MPSAFE);
 
 	/* Kick off timeout driven events by calling first time. */
 	loadav(NULL);
-	lboltcb(NULL);
 }
 
 /*