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    SubjectRe: [PATCH 03/25] add dyn_array support
    On Sat, Aug 2, 2008 at 9:55 PM, Johannes Weiner <hannes@saeurebad.de> wrote:
    > Hi,
    >
    > "Yinghai Lu" <yhlu.kernel@gmail.com> writes:
    >
    >> On Sat, Aug 2, 2008 at 9:03 PM, Johannes Weiner <hannes@saeurebad.de> wrote:
    >>> Hi,
    >>>
    >>> Yinghai Lu <yhlu.kernel@gmail.com> writes:
    >>>
    >>>> could have crazy big arrays and allocate them in bootmem at init stage.
    >>>> also also to allocate array according to size we need to use to avoid wasting
    >>>> memory
    >>>> use CONFIG_HAVE_DYN_ARRAY to enable it or not
    >>>>
    >>>> usage:
    >>>>
    >>>> |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;
    >>>> | struct irq_desc *desc;
    >>>> | int i;
    >>>> |
    >>>> | desc = *da->name;
    >>>
    >>> Where *da->name might be NULL...

    *da->name = __alloc_bootmem_nopanic(size, da->align, phys);

    YH


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