Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH 20/25] make irq_desc to use dyn_array | Date | Sat, 2 Aug 2008 19:59:20 -0700 |
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Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> --- include/linux/irq.h | 4 ++++ kernel/irq/handle.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/include/linux/irq.h b/include/linux/irq.h index bd69d90..c22e870 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -181,7 +181,11 @@ struct irq_desc { const char *name; } ____cacheline_internodealigned_in_smp; +#ifdef CONFIG_HAVE_DYN_ARRAY +extern struct irq_desc *irq_desc; +#else extern struct irq_desc irq_desc[NR_IRQS]; +#endif /* * Migration helpers for obsolete names, they will go away: diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index e9d022c..6ea252d 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -48,6 +48,36 @@ handle_bad_irq(unsigned int irq, struct irq_desc *desc) * Controller mappings for all interrupt sources: */ 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->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 = { [0 ... NR_IRQS-1] = { .status = IRQ_DISABLED, @@ -60,6 +90,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = { #endif } }; +#endif /* * What should we do if we get a hw irq event on an illegal vector? -- 1.5.4.5
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