[patch 27/32] s390: Avoid call to irq_reserve_irqs()

[Thomas Gleixner]

There is no need to mark the lower interrupts as reserved in order to
exclude them from dynamic allocation.

Provide arch_dynirq_lower_bound() to exclude the lower space.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: linux390@xxxxxxxxxx
---
 arch/s390/kernel/irq.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Index: tip/arch/s390/kernel/irq.c
===================================================================
--- tip.orig/arch/s390/kernel/irq.c
+++ tip/arch/s390/kernel/irq.c
@@ -92,7 +92,6 @@ static const struct irq_class irqclass_s
 
 void __init init_IRQ(void)
 {
-	irq_reserve_irqs(0, THIN_INTERRUPT);
 	init_cio_interrupts();
 	init_airq_interrupts();
 	init_ext_interrupts();
@@ -151,6 +150,11 @@ out:
 	return 0;
 }
 
+unsigned int arch_dynirq_lower_bound(unsigned int from)
+{
+	return from < THIN_INTERRUPT ? THIN_INTERRUPT : from;
+}
+
 /*
  * Switch to the asynchronous interrupt stack for softirq execution.
  */


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