[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>

1 files changed, 4 insertions, 16 deletions

diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index 8e56c58320ba..552ca1cb9847 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--;