diff --git a/arch/arm/mach-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c
index b8c7b00522e6..24d424e10e4c 100644
--- a/arch/arm/mach-ns9xxx/irq.c
+++ b/arch/arm/mach-ns9xxx/irq.c
@@ -17,33 +17,6 @@
 
 #include "generic.h"
 
-static void ns9xxx_ack_irq_timer(unsigned int irq)
-{
-	u32 tc = SYS_TC(irq - IRQ_TIMER0);
-
-	/*
-	 * If the timer is programmed to halt on terminal count, the
-	 * timer must be disabled before clearing the interrupt.
-	 */
-	if (REGGET(tc, SYS_TCx, REN) == 0) {
-		REGSET(tc, SYS_TCx, TEN, DIS);
-		SYS_TC(irq - IRQ_TIMER0) = tc;
-	}
-
-	REGSET(tc, SYS_TCx, INTC, SET);
-	SYS_TC(irq - IRQ_TIMER0) = tc;
-
-	REGSET(tc, SYS_TCx, INTC, UNSET);
-	SYS_TC(irq - IRQ_TIMER0) = tc;
-}
-
-static void (*ns9xxx_ack_irq_functions[NR_IRQS])(unsigned int) = {
-	[IRQ_TIMER0] = ns9xxx_ack_irq_timer,
-	[IRQ_TIMER1] = ns9xxx_ack_irq_timer,
-	[IRQ_TIMER2] = ns9xxx_ack_irq_timer,
-	[IRQ_TIMER3] = ns9xxx_ack_irq_timer,
-};
-
 static void ns9xxx_mask_irq(unsigned int irq)
 {
 	/* XXX: better use cpp symbols */
@@ -52,12 +25,6 @@ static void ns9xxx_mask_irq(unsigned int irq)
 
 static void ns9xxx_ack_irq(unsigned int irq)
 {
-	if (!ns9xxx_ack_irq_functions[irq]) {
-		printk(KERN_ERR "no ack function for irq %u\n", irq);
-		BUG();
-	}
-
-	ns9xxx_ack_irq_functions[irq](irq);
 	SYS_ISRADDR = 0;
 }
 
diff --git a/arch/arm/mach-ns9xxx/time.c b/arch/arm/mach-ns9xxx/time.c
index b97d0c54a388..3327d302618d 100644
--- a/arch/arm/mach-ns9xxx/time.c
+++ b/arch/arm/mach-ns9xxx/time.c
@@ -24,10 +24,24 @@ static u32 usecs_per_tick;
 static irqreturn_t
 ns9xxx_timer_interrupt(int irq, void *dev_id)
 {
+	int timerno = irq - IRQ_TIMER0;
+	u32 tc;
+
 	write_seqlock(&xtime_lock);
 	timer_tick();
 	write_sequnlock(&xtime_lock);
 
+	/* clear irq */
+	tc = SYS_TC(timerno);
+	if (REGGET(tc, SYS_TCx, REN) == SYS_TCx_REN_DIS) {
+		REGSET(tc, SYS_TCx, TEN, DIS);
+		SYS_TC(timerno) = tc;
+	}
+	REGSET(tc, SYS_TCx, INTC, SET);
+	SYS_TC(timerno) = tc;
+	REGSET(tc, SYS_TCx, INTC, UNSET);
+	SYS_TC(timerno) = tc;
+
 	return IRQ_HANDLED;
 }