linux-kernel - Re: Dual licensing [was: [PATCH 2/5] misc: mlx5ctl: Add mlx5ctl misc driver]

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Message-ID: <CAPM=9twY41Xd+=M+bkHapJpNh1bH-SHHarrED1=_x0Gd6SWpHA@mail.gmail.com>
Date:   Sat, 21 Oct 2023 05:30:41 +1000
From:   Dave Airlie <airlied@...il.com>
To:     Jonathan Corbet <corbet@....net>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        Saeed Mahameed <saeed@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        Leon Romanovsky <leonro@...dia.com>,
        Jiri Pirko <jiri@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: Re: Dual licensing [was: [PATCH 2/5] misc: mlx5ctl: Add mlx5ctl misc driver]

On Fri, 20 Oct 2023 at 07:51, Jonathan Corbet <corbet@....net> wrote:
>
> Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
>
> > For your new files, please make them single license.  If you insist on
> > dual licensing them, I will insist on have a lawyer sign off on them so
> > that they understand the issues involved with dual licenses, and just
> > how much I hate them in the kernel tree as they are a pain over time.
>
> Out of curiosity, is there somewhere people can look for a description
> of these issues and the pain they cause?  I've seen this go by enough
> times to think that it would be good to set down in Documentation/
> somewhere for future reference.

I'm also very curious, I've never had any issues in 15+ years with the
dual licensed code in the DRM, and continue to prefer it.

Greg if you get new advice that you want to apply to the kernel as a
whole, you probably need to write it up for us to discuss, your
lawyers are not my lawyers etc.

Maybe something for Maintainers summit?

Dave.