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    SubjectRe: v4l regression: V4L2_CID_[VH]CENTER disappeared without notice.
    On Mon, 2008-06-02 at 20:19 +0100, Alan Cox wrote:
    > > Don't forget to document how people are _supposed_ to use the v4l api
    > > from userspace, though.
    > Correct but those methods are not part of the V4L2 API and have not been
    > for some considerable time.

    It seems that message hadn't got through. Any suggestions as to how we
    could make sure it does in future?

    The usual answers are (in order of preference):
    1) don't remove userspace APIs
    2) don't remove userspace APIs
    3) Documentation/feature-removal-schedule.txt
    4) don't remove userspace APIs

    It would be good if we could combine #3 with some form of
    __deprecated... can we make that work for ioctls in userspace?


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