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s390/irq: use irq 0

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Irq 0 is currently unused on s390. Since there is no reason to
do this start counting at the beginning and gain an additional
irq. Also correctly report the smallest usable irq number for
dynamic allocation.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott
2014-11-14 11:01:37 +01:00
committed by Martin Schwidefsky
parent 99e97b7106
commit afaa7d29bc
2 changed files with 5 additions and 11 deletions
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5
arch/s390/kernel/irq.c
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@@ -127,13 +127,10 @@ int show_interrupts(struct seq_file *p, void *v)
for_each_online_cpu(cpu)
seq_printf(p, "CPU%d ", cpu);
seq_putc(p, '\n');
goto out;
}
if (index < NR_IRQS) {
if (index >= NR_IRQS_BASE)
goto out;
/* Adjust index to process irqclass_main_desc array entries */
index--;
seq_printf(p, "%s: ", irqclass_main_desc[index].name);
irq = irqclass_main_desc[index].irq;
for_each_online_cpu(cpu)
@@ -158,7 +155,7 @@ out:
unsigned int arch_dynirq_lower_bound(unsigned int from)
{
return from < THIN_INTERRUPT ? THIN_INTERRUPT : from;
return from < NR_IRQS_BASE ? NR_IRQS_BASE : from;
}
/*