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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-08-20 05:50:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:52:07 +0200 |
| commit | d60458b224d6b997a582a05cb8c4b9bed9e17a1d (patch) | |
| tree | 122710312c443069cb8e25a27032f09572550c45 | |
| parent | irq: make irq2_iommu to use dyn_array (diff) | |
| download | linux-d60458b224d6b997a582a05cb8c4b9bed9e17a1d.tar.xz linux-d60458b224d6b997a582a05cb8c4b9bed9e17a1d.zip | |
irq: make irq_desc to use dyn_array
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/irq.h | 4 | ||||
| -rw-r--r-- | 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 1d73d1abb834..5f4b013624dc 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -179,7 +179,11 @@ 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 e9d022cf593e..e94eeca09ea9 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_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 = { [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? |