From 872aaa65a6ef30edef05a89977f7021f9840b215 Mon Sep 17 00:00:00 2001
From: Jeff Dike <jdike@addtoit.com>
Date: Mon, 10 Jul 2006 04:45:08 -0700
Subject: [PATCH] [PATCH] uml: timer handler tidying
Get rid of a user of timer_irq_inited (and first_tick) by observing that
prev_ticks can be used to decide if this is the first call.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/um/kernel/time_kern.c | 20 ++++----------------
1 file changed, 4 insertions(+), 16 deletions(-)
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index 8e56c58320b..552ca1cb984 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time_kern.c
@@ -38,7 +38,6 @@ unsigned long long sched_clock(void)
/* Changed at early boot */
int timer_irq_inited = 0;
-static int first_tick;
static unsigned long long prev_nsecs;
#ifdef CONFIG_UML_REAL_TIME_CLOCK
static long long delta; /* Deviation per interval */
@@ -48,15 +47,8 @@ void timer_irq(union uml_pt_regs *regs)
{
unsigned long long ticks = 0;
- if(!timer_irq_inited){
- /* This is to ensure that ticks don't pile up when
- * the timer handler is suspended */
- first_tick = 0;
- return;
- }
-
- if(first_tick){
#ifdef CONFIG_UML_REAL_TIME_CLOCK
+ if(prev_nsecs){
/* We've had 1 tick */
unsigned long long nsecs = os_nsecs();
@@ -69,15 +61,11 @@ void timer_irq(union uml_pt_regs *regs)
ticks += (delta * HZ) / BILLION;
delta -= (ticks * BILLION) / HZ;
+ }
+ else prev_nsecs = os_nsecs();
#else
- ticks = 1;
+ ticks = 1;
#endif
- }
- else {
- prev_nsecs = os_nsecs();
- first_tick = 1;
- }
-
while(ticks > 0){
do_IRQ(TIMER_IRQ, regs);
ticks--;
--
2.41.3