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Date: Wed, 16 Sep 2026 19:52:54 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: "Rafael J. Wysocki (Intel)" <rafael@kernel.org>
Cc: Danilo Krummrich <dakr@kernel.org>,
	Linux ACPI <linux-acpi@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Linux Driver Core Development <driver-core@lists.linux.dev>
Subject: Re: [PATCH v2] driver core/ACPI: Introduce companion_bus_register()
Message-ID: <2026091644-shiftless-armchair-a429@gregkh>
References: <6329043.lOV4Wx5bFT@rafael.j.wysocki>
 <CAJZ5v0geju99B56CqAQjKwZcwg7mqXPUxx_a=kQ1KpaKpQztuw@mail.gmail.com>
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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@kernel.org> wrote:
> >
> > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> >
> > 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@intel.com>
> 
> 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@linuxfoundation.org>