1 files changed, 14 insertions, 2 deletions

diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 8670b3ce626e..31ebfe38e96c 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -69,6 +69,18 @@ DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
         [IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
 };
 
+int vector_used_by_percpu_irq(unsigned int vector)
+{
+        int cpu;
+
+        for_each_online_cpu(cpu) {
+                if (per_cpu(vector_irq, cpu)[vector] != -1)
+                        return 1;
+        }
+
+        return 0;
+}
+
 void __init init_ISA_irqs(void)
 {
         int i;
@@ -76,8 +88,7 @@ void __init init_ISA_irqs(void)
         init_bsp_APIC();
         init_8259A(0);
 
-        for (i = 0; i < 16; i++) {
-                /* first time call this irq_desc */
+        for (i = 0; i < NR_IRQS_LEGACY; i++) {
                 struct irq_desc *desc = irq_to_desc(i);
 
                 desc->status = IRQ_DISABLED;
@@ -122,6 +133,7 @@ static void __init smp_intr_init(void)
 
         /* Low priority IPI to cleanup after moving an irq */
         set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
+        set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors);
 #endif
 }