Changing smbus ABI

[Warner Losh]

> On Mar 21, 2015, at 5:26 AM, Michael Gmelin <freebsd at grem.de> wrote:
> 
> I'm planning to change the smbcmd structure in an incompatible way (see
> 'man smb' and https://reviews.freebsd.org/D1955?id=4055#inline-12187) in
> HEAD.
> 
> I'm not aware of any applications relying on this ABI and adding a
> compatibility wrapper later shouldn't be a big deal either. I would
> prefer to avoid the additional complexity introduced by such wrapper if
> it isn't required anyway.

We have compete code for FreeBSD 4.x in the driver now. Don’t know
why it was added. IIRC, this interface is used by the X server on some
cards to get data from the smbus that’s behind the video chips, which
would likely make compat interface almost required.

Warner


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