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x86: put irq_2_iommu pointer into irq_desc

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when CONFIG_HAVE_SPARSE_IRQ
preallocate some irq_2_iommu entries, and use get_one_free_irq_2_iomm to
get new one and link to irq_desc if needed.

else will use dyn_array or static array.

v2: <= nr_irqs fix

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 20:50:21 -07:00
committed by Ingo Molnar
parent 52b17329d6
commit e420dfb40c
2 changed files with 170 additions and 49 deletions
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4
include/linux/irq.h
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@@ -128,6 +128,7 @@ struct irq_chip {
};
struct timer_rand_state;
struct irq_2_iommu;
/**
* struct irq_desc - interrupt descriptor
*
@@ -162,6 +163,9 @@ struct irq_desc {
unsigned int *kstat_irqs;
#else
unsigned int kstat_irqs[NR_CPUS];
#endif
#if defined(CONFIG_INTR_REMAP) && defined(CONFIG_HAVE_SPARSE_IRQ)
struct irq_2_iommu *irq_2_iommu;
#endif
irq_flow_handler_t handle_irq;
struct irq_chip *chip;