Re: [RFC] remove bus_memio.h and bus_pio.h

From: Marcel Moolenaar (marcel_at_xcllnt.net)
Date: 05/25/05

  • Next message: Doug Rabson: "Re: [RFC] remove bus_memio.h and bus_pio.h" 
    Date: Wed, 25 May 2005 10:40:23 -0700
To: "M. Warner Losh" <imp@bsdimp.com>

    On May 25, 2005, at 10:19 AM, M. Warner Losh wrote:

    > Short answer:
    >
    > Great idea.

    Seconded.

    > Longer, more detailed answer.
    >
    > The original idea was to provide a hint to busspace that this driver
    > only ever used a certain subset of the available mappings so it should
    > assume that subset and agressively optimize the code.

    It has also worked against, well, me in the past in that I couldn't
    figure out why a driver simply didn't want to work with memio while
    it worked perfectly with pio. Then I spotted the bus_pio.h header at
    the top and cursed, cursed, cursed.

    I'm all for performance tuning, but the newbus optimization is just
    too weird for its own good this way. 

    -- 
  Marcel Moolenaar         USPA: A-39004          marcel@xcllnt.net
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