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    SubjectRe: 64-bit shm: abi problems
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    "David S. Miller" <davem@redhat.com> writes:

    > From: kanoj@google.engr.sgi.com (Kanoj Sarcar)
    > Date: Mon, 13 Dec 1999 10:32:51 -0800 (PST)
    >
    > "shm_segsz" might be flipped, yes.
    >
    > This is what I was referring to.
    >
    > The change being mentioned in this discussion cannot happen as-is.
    >
    > You should add a new system call entry which provides the new ABI,
    > and preserve the old ABI in the existing entry. Or find some other
    > method to export the new functionality.
    >
    > You cannot simply change the ABI and still use the old system call
    > entry, this is not an option.

    On many platforms you probably do not need a new syscall. They use the
    sys_ipc demultiplexer and you can simply add a new sys_ipc command.

    Greetings
    Christoph

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