genirq: Query arch for number of early descriptors
sparse irq sets up NR_IRQS_LEGACY irq descriptors and archs then go
ahead and allocate more.
Use the unused return value of arch_probe_nr_irqs() to let the
architecture return the number of early allocations. Fix up all users.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index c0d5c3b..5456d11 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -157,10 +157,8 @@
struct irq_desc *desc;
int irq;
- for (irq = 0; irq < nr_irqs; irq++) {
- desc = irq_to_desc_alloc_node(irq, 0);
+ for (irq = 0; irq < nr_irqs; irq++)
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
- }
init_arch_irq();
}
@@ -169,7 +167,7 @@
int __init arch_probe_nr_irqs(void)
{
nr_irqs = arch_nr_irqs ? arch_nr_irqs : NR_IRQS;
- return 0;
+ return nr_irqs;
}
#endif