From 168be6199ea7c1475b19bd76360d43f6b4e67e96 Mon Sep 17 00:00:00 2001
From: Bruce Evans <bde@FreeBSD.org>
Date: Mon, 23 Feb 1998 00:11:25 +0000
Subject: [PATCH] Quick fix for the i8254 timecounter often gaining 10 msec.

---
 sys/amd64/amd64/tsc.c | 3 ++-
 sys/amd64/isa/clock.c | 3 ++-
 sys/i386/i386/tsc.c   | 3 ++-
 sys/i386/isa/clock.c  | 3 ++-
 sys/isa/atrtc.c       | 3 ++-
 5 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/sys/amd64/amd64/tsc.c b/sys/amd64/amd64/tsc.c
index 9941f73766bd..bc0b9513c555 100644
--- a/sys/amd64/amd64/tsc.c
+++ b/sys/amd64/amd64/tsc.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.111 1998/02/20 16:35:37 phk Exp $
+ *	$Id: clock.c,v 1.112 1998/02/21 20:45:27 jkh Exp $
  */
 
 /*
@@ -190,6 +190,7 @@ clkintr(struct clockframe frame)
 		i8254_offset += timer0_max_count;
 	else
 		i8254_ticked = 0;
+	i8254_lastcount = 0;
 	timer_func(&frame);
 	switch (timer0_state) {
 
diff --git a/sys/amd64/isa/clock.c b/sys/amd64/isa/clock.c
index 9941f73766bd..bc0b9513c555 100644
--- a/sys/amd64/isa/clock.c
+++ b/sys/amd64/isa/clock.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.111 1998/02/20 16:35:37 phk Exp $
+ *	$Id: clock.c,v 1.112 1998/02/21 20:45:27 jkh Exp $
  */
 
 /*
@@ -190,6 +190,7 @@ clkintr(struct clockframe frame)
 		i8254_offset += timer0_max_count;
 	else
 		i8254_ticked = 0;
+	i8254_lastcount = 0;
 	timer_func(&frame);
 	switch (timer0_state) {
 
diff --git a/sys/i386/i386/tsc.c b/sys/i386/i386/tsc.c
index 9941f73766bd..bc0b9513c555 100644
--- a/sys/i386/i386/tsc.c
+++ b/sys/i386/i386/tsc.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.111 1998/02/20 16:35:37 phk Exp $
+ *	$Id: clock.c,v 1.112 1998/02/21 20:45:27 jkh Exp $
  */
 
 /*
@@ -190,6 +190,7 @@ clkintr(struct clockframe frame)
 		i8254_offset += timer0_max_count;
 	else
 		i8254_ticked = 0;
+	i8254_lastcount = 0;
 	timer_func(&frame);
 	switch (timer0_state) {
 
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index 9941f73766bd..bc0b9513c555 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.111 1998/02/20 16:35:37 phk Exp $
+ *	$Id: clock.c,v 1.112 1998/02/21 20:45:27 jkh Exp $
  */
 
 /*
@@ -190,6 +190,7 @@ clkintr(struct clockframe frame)
 		i8254_offset += timer0_max_count;
 	else
 		i8254_ticked = 0;
+	i8254_lastcount = 0;
 	timer_func(&frame);
 	switch (timer0_state) {
 
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c
index 9941f73766bd..bc0b9513c555 100644
--- a/sys/isa/atrtc.c
+++ b/sys/isa/atrtc.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.111 1998/02/20 16:35:37 phk Exp $
+ *	$Id: clock.c,v 1.112 1998/02/21 20:45:27 jkh Exp $
  */
 
 /*
@@ -190,6 +190,7 @@ clkintr(struct clockframe frame)
 		i8254_offset += timer0_max_count;
 	else
 		i8254_ticked = 0;
+	i8254_lastcount = 0;
 	timer_func(&frame);
 	switch (timer0_state) {