Revert "x86: fix IO APIC breakage on HP nx6325, v2"

This reverts commit a74a1cc3df0be89658bc735c8aed80c8392e2c15.

This was just temporary diagnostics commit - not needed now that we've
got the final fix.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/io_apic_64.c

@@ -373,26 +373,6 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin)
 	entry->pin = pin;
 }
 
-/*
- * Reroute an IRQ to a different pin.
- */
-static void __init replace_pin_at_irq(unsigned int irq,
-				      int oldapic, int oldpin,
-				      int newapic, int newpin)
-{
-	struct irq_pin_list *entry = irq_2_pin + irq;
-
-	while (1) {
-		if (entry->apic == oldapic && entry->pin == oldpin) {
-			entry->apic = newapic;
-			entry->pin = newpin;
-		}
-		if (!entry->next)
-			break;
-		entry = irq_2_pin + entry->next;
-	}
-}
-
 
 #define DO_ACTION(name,R,ACTION, FINAL)					\
 									\
@@ -1724,11 +1704,6 @@ static inline void __init check_timer(void)
 		apic2 = apic1;
 	}
 
-	replace_pin_at_irq(0, 0, 0, apic1, pin1);
-	apic1 = 0;
-	pin1 = 0;
-	setup_timer_IRQ0_pin(apic1, pin1, cfg->vector);
-
 	if (pin1 != -1) {
 		/*
 		 * Ok, does IRQ0 through the IOAPIC work?
@@ -1760,9 +1735,10 @@ static inline void __init check_timer(void)
 		/*
 		 * legacy devices should be connected to IO APIC #0
 		 */
-		replace_pin_at_irq(0, apic1, pin1, apic2, pin2);
+		/* replace_pin_at_irq(0, apic1, pin1, apic2, pin2); */
 		setup_timer_IRQ0_pin(apic2, pin2, cfg->vector);
 		unmask_IO_APIC_irq(0);
+		clear_IO_APIC_pin(apic2, pin2);
 		enable_8259A_irq(0);
 		if (timer_irq_works()) {
 			apic_printk(APIC_VERBOSE," works.\n");