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    SubjectRe: [PATCH 4/4] mm: variable length argument support
    On Tue, 05 Jun 2007 17:05:27 +0200 Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

    > From: Ollie Wild <aaw@google.com>
    >
    > Remove the arg+env limit of MAX_ARG_PAGES by copying the strings directly
    > from the old mm into the new mm.
    >
    > We create the new mm before the binfmt code runs, and place the new stack
    > at the very top of the address space. Once the binfmt code runs and figures
    > out where the stack should be, we move it downwards.
    >
    > It is a bit peculiar in that we have one task with two mm's, one of which is
    > inactive.
    >
    > ...
    >
    > + flush_cache_page(bprm->vma, kpos,
    > + page_to_pfn(kmapped_page));

    Breaks SuperH:

    fs/exec.c: In function `bprm_mm_init':
    fs/exec.c:268: warning: unused variable `vma'
    fs/exec.c: In function `copy_strings':
    fs/exec.c:431: error: structure has no member named `vma'

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