Merge commit 'v2.6.29-rc4' into perfcounters/core

Conflicts:
	arch/x86/kernel/setup_percpu.c
	arch/x86/mm/fault.c
	drivers/acpi/processor_idle.c
	kernel/irq/handle.c

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/x86/mach-default/setup.c b/arch/x86/mach-default/setup.c
index df167f265622..a265a7c63190 100644
--- a/arch/x86/mach-default/setup.c
+++ b/arch/x86/mach-default/setup.c
@@ -38,6 +38,15 @@ void __init pre_intr_init_hook(void)
 	init_ISA_irqs();
 }
 
+/*
+ * IRQ2 is cascade interrupt to second interrupt controller
+ */
+static struct irqaction irq2 = {
+	.handler = no_action,
+	.mask = CPU_MASK_NONE,
+	.name = "cascade",
+};
+
 /**
  * intr_init_hook - post gate setup interrupt initialisation
  *
@@ -53,6 +62,9 @@ void __init intr_init_hook(void)
 		if (x86_quirks->arch_intr_init())
 			return;
 	}
+	if (!acpi_ioapic)
+		setup_irq(2, &irq2);
+
 }
 
 /**