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SubjectRe: [PATCH v5 1/4] x86/signal/64: Add a comment about sigcontext->fs and gs

* Andy Lutomirski <luto@kernel.org> wrote:

> + * If the kernel ever adds explicit fs, gs, fsbase, and gsbase
> + * save/restore, it will most likely need to be opt-in and use
> + * different context slots.

Btw., that's not necessarily true: it could also be made opt-out, and a
modify_ldt() or any other cleanly identifiable legacy usage/signature that is
associated with DOSEMU might trigger the opt-out automatically as well.

I.e. behaviorally it would still keep the ABI and modern default behavior could
still be whatever we want to make it.

Thanks,

Ingo

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