x86: make 32 bit to use sparse_irq
but actually irq still needs to be less than NR_IRQS, because
interrupt[NR_IRQS] in entry.S.
need to enable per_cpu vector...
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index 65c1c95..ded09ac 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -69,6 +69,13 @@
* 16 old-style INTA-cycle interrupts:
*/
for (i = 0; i < 16; i++) {
+ /* first time call this irq_desc */
+ struct irq_desc *desc = irq_to_desc_alloc(i);
+
+ desc->status = IRQ_DISABLED;
+ desc->action = NULL;
+ desc->depth = 1;
+
set_irq_chip_and_handler_name(i, &i8259A_chip,
handle_level_irq, "XT");
}