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    SubjectRe: [PATCH 1/3] powerpc - Initialize the irq radix tree earlier
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    > - Remove the populating of the tree from the revmap function as
    > you already do
    > - Move it to irq_create_mapping() for the normal case
    > - For pre-existing interrupt, have the generic code that initializes
    > the radix tree walk through all interrupts and setup the revmap for
    > them. If that needs locking vs. concurrent irq_create_mapping, it's
    > easy to use one of the available spinlocks for that.

    And in fact, you may even be able to avoid GFP_ATOMIC completely here
    and switch it to GFP_KERNEL since irq_create_mapping() can sleep afaik,
    provided that you avoid the spinlocking.

    Ben.




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