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    SubjectRe: [PATCH v2 0/8] sparc: use asm-generic/dma-mapping-common.h and pci-dma-compat.h
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    From: Ingo Molnar <mingo@elte.hu>
    Date: Sat, 18 Jul 2009 13:06:20 +0200

    > I'm wondering why sparc32 frees from the middle of the kernel image.
    > The way architectures generally do it is to put freeable pages into
    > a separate section. That way it does not get mingled with the kernel
    > core image area (which stays nicely continuous).

    It's conditionally free'able, we actually use the pages
    if the system is SMP and has more than cpu 0 installed.


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