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    SubjectRe: [PATCH 3/3] ACPI: thinkpad-acpi: change thinkpad-acpi input default and kconfig help
    On Thu, 16 Aug 2007, Michael S. Tsirkin wrote:
    > > I *can* make the compile-time option a module parameter, though. That
    > > wouldn't be much of a problem, and the compile-time option would select the
    > > default for that parameter, but it would be easier to override it at run
    > > time (you can already do it, but it requires reprogramming various driver
    > > parameters using sysfs and the input device IOCTLs).
    > >
    > > Would a module parameter address enough of your concerns? Kconfig would
    > > only set the default for that parameter, then...
    >
    > I really think modifying defaults it not a great idea.
    > What about adding a writeable module parameter?
    > Then new HAL would just write to /sysfs/module/thinkpad/parameters/interface_version to
    > switch to new behaviour.

    Nah. This thing regulates what the module has to do when it loads and inits
    the firmware, and the whole point of the new behaviour is to get userspace
    to be as hands' off as possible, so that we can auto-tune things better
    in-kernel, without a need to worry about HAL and friends overwriting local
    admin configurations needlessly.

    I will probably have to do something like the strict versioned interfaces of
    wireless extensions, I think. It really is a case of a deprecation of
    current userland interfaces done sanely. Right now I am thinking about
    giving userland two kernel releases before I change the default interface
    level, and one to two years to remove the older ones.

    --
    "One disk to rule them all, One disk to find them. One disk to bring
    them all and in the darkness grind them. In the Land of Redmond
    where the shadows lie." -- The Silicon Valley Tarot
    Henrique Holschuh
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