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irq: make irq_desc to use dyn_array

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Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-08-19 20:50:00 -07:00 committed by Ingo Molnar
parent 5aeecaf490
commit d60458b224
2 changed files with 35 additions and 0 deletions
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4
include/linux/irq.h
View file

@ -179,7 +179,11 @@ struct irq_desc {
const char *name; const char *name;
} ____cacheline_internodealigned_in_smp; } ____cacheline_internodealigned_in_smp;
#ifdef CONFIG_HAVE_DYN_ARRAY
extern struct irq_desc *irq_desc;
#else
extern struct irq_desc irq_desc[NR_IRQS]; extern struct irq_desc irq_desc[NR_IRQS];
#endif
/* /*
* Migration helpers for obsolete names, they will go away: * Migration helpers for obsolete names, they will go away:

31
kernel/irq/handle.c
View file

@ -48,6 +48,36 @@ handle_bad_irq(unsigned int irq, struct irq_desc *desc)
* Controller mappings for all interrupt sources: * Controller mappings for all interrupt sources:
*/ */
int nr_irqs = NR_IRQS; int nr_irqs = NR_IRQS;
#ifdef CONFIG_HAVE_DYN_ARRAY
static struct irq_desc irq_desc_init __initdata = {
.status = IRQ_DISABLED,
.chip = &no_irq_chip,
.handle_irq = handle_bad_irq,
.depth = 1,
.lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
#ifdef CONFIG_SMP
.affinity = CPU_MASK_ALL
#endif
};
static void __init init_work(void *data)
{
struct dyn_array *da = data;
int i;
struct irq_desc *desc;
desc = *da->name;
for (i = 0; i < *da->nr; i++)
memcpy(&desc[i], &irq_desc_init, sizeof(struct irq_desc));
}
struct irq_desc *irq_desc;
DEFINE_DYN_ARRAY(irq_desc, sizeof(struct irq_desc), nr_irqs, PAGE_SIZE, init_work);
#else
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = { struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = { [0 ... NR_IRQS-1] = {
.status = IRQ_DISABLED, .status = IRQ_DISABLED,
@ -60,6 +90,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
#endif #endif
} }
}; };
#endif
/* /*
* What should we do if we get a hw irq event on an illegal vector? * What should we do if we get a hw irq event on an illegal vector?