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    SubjectRe: [RFC] irq handling code consolidation, second try (ppc part)

    > The "easy" way here to implement that is to make the irq_desc array
    > larger than NR_IRQs (or rather split NR_IRQs into NR_SYS_IRQS +
    > NR_DYNAMIC_IRQS). The additional "slots" could then easily be
    > allocated/freed.

    On ppc64 irqs are sparse and can be very large (> 1000) so we have a
    mapping between them and slots in irq_desc[NR_IRQS]. I wonder how
    hard it would be to kill irq_desc and just dynamically allocate
    irq_desc stuff. That would solve my problem.

    Anton
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