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    SubjectRe: [PATCH -mm -v4 1/3] i386/x86_64 boot: setup data
    On 10/9/07, Andi Kleen <ak@suse.de> wrote:
    >
    > > Care to add a line of documentation if you keep it in mm/memory.c?
    >
    > It would be better to just use early_ioremap() (or ioremap())
    >
    > That is how ACPI who has similar issues accessing its tables solves this.

    Yes. That is another solution. But there is some problem about
    early_ioremap (boot_ioremap, bt_ioremap for i386) or ioremap.

    - ioremap can not be used before mem_init.
    - For i386, boot_ioremap can map at most 4 pages, bt_ioremap can map
    at most 16 pages. This will be an unnecessary constrains for size of
    setup_data.
    - For i386, the virtual memory space of ioremap is limited too.

    Best Regards,
    Huang Ying
    -
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