We pre-reserve irq range for hot-added ioapic, and later only
some are used via realloc.
So during hot-remove, we need to clear bits in allocated_irqs
for both case.
Check if the irq_desc is there at first, and bail out early if
irq_desc is not allocated yet.
So we can use irq_free_descs to
We pre-reserve irq range for hot-added ioapic, and later only
some are used via realloc.
So during hot-remove, we need to clear bits in allocated_irqs
for both case.
Check if the irq_desc is there at first, and bail out early if
irq_desc is not allocated yet.
So we can use irq_free_descs to
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