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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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