sparse irq_desc[] array: core kernel and x86 changes

[safe/jmp/linux-2.6] / arch / x86 / kernel / irqinit_64.c

diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 5b5be9d..cd9f42d 100644 (file)
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -142,23 +142,18 @@ void __init init_ISA_irqs(void)
        init_bsp_APIC();
        init_8259A(0);
 
-       for (i = 0; i < NR_IRQS; i++) {
-               irq_desc[i].status = IRQ_DISABLED;
-               irq_desc[i].action = NULL;
-               irq_desc[i].depth = 1;
-
-               if (i < 16) {
-                       /*
-                        * 16 old-style INTA-cycle interrupts:
-                        */
-                       set_irq_chip_and_handler_name(i, &i8259A_chip,
+       for (i = 0; i < 16; i++) {
+               struct irq_desc *desc = irq_to_desc(i);
+
+               desc->status = IRQ_DISABLED;
+               desc->action = NULL;
+               desc->depth = 1;
+
+               /*
+                * 16 old-style INTA-cycle interrupts:
+                */
+               set_irq_chip_and_handler_name(i, &i8259A_chip,
                                                      handle_level_irq, "XT");
-               } else {
-                       /*
-                        * 'high' PCI IRQs filled in on demand
-                        */
-                       irq_desc[i].chip = &no_irq_chip;
-               }
        }
 }