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SubjectRe: [PATCH 2/4] irq: allocate irq_desc_ptrs array based on nr_irqs

* Mike Travis <travis@sgi.com> wrote:

> +++ linux-2.6-for-ingo/kernel/irq/internals.h
> @@ -16,7 +16,11 @@ extern int __irq_set_trigger(struct irq_
> extern struct lock_class_key irq_desc_lock_class;
> extern void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr);
> extern spinlock_t sparse_irq_lock;
> +#ifdef CONFIG_SPARSE_IRQ
> +extern struct irq_desc **irq_desc_ptrs;
> +#else
> extern struct irq_desc *irq_desc_ptrs[NR_IRQS];
> +#endif

why the #ifdef? irq_desc_ptrs is only defined and used by sparseirq.

Ingo


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