Re: [PATCH v2] driver core/ACPI: Introduce companion_bus_register()

[Greg Kroah-Hartman]

On Wed, Sep 16, 2026 at 08:45:50PM +0200, Rafael J. Wysocki (Intel) wrote:
> On Wed, Sep 9, 2026 at 6:41 PM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
> >
> > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >
> > The ACPI bus type does not allow drivers to be registered, so the sysfs
> > attributes related to drivers created for it and its devices are
> > useless, and its drivers/ directory is always empty.  All of that is
> > confusing and wasteful.
> >
> > To allow skipping the creation of those sysfs attributes, introduce a
> > "companion" bus type concept and add a special registration function for
> > registering "companion" bus types, companion_bus_register().
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> 
> It's been a while since this was posted, so any feedback would be appreciated.
> 
> In the absence thereof, I'll trust Sashiko that there are no issues
> with it and pick it up.

Looks sane:

Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>