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    SubjectRe: f_ops flag to speed up compatible ioctls in linux kernel
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        Chris> You forgot a driver specific filesystem which exposes
    Chris> requests in a file per request type style. Also, there's a
    Chris> simple_transaction type of file which can allow you
    Chris> send/recv data and should eliminate the need for tagging.
    Chris> Example, look at nfsd fs (fs/nfsd/nfsctl.c).

    Thanks, I'll take a look at this. How does one handle the 32-bit
    userspace / 64-bit kernel compat layer in this setup?

    - R.

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