linux-kernel - Re: [PATCH v2 5/5] memory: renesas-rpc-if: Export symbols as GPL

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Message-ID: <20201128114145.GE4761@kozik-lap>
Date:   Sat, 28 Nov 2020 12:41:45 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jiri Kosina <trivial@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        linux-renesas-soc@...r.kernel.org, Pavel Machek <pavel@...x.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>
Subject: Re: [PATCH v2 5/5] memory: renesas-rpc-if: Export symbols as GPL

On Thu, Nov 26, 2020 at 07:11:46PM +0000, Lad Prabhakar wrote:
> Renesas RPC-IF driver is licensed under GPL2.0, to be in sync export the
> symbols as GPL.

It's not a valid reason to export them as GPL. Entire Linux source code
is licensed as GPL-2.0, so are you going to change all EXPORT_SYMBOL to
GPL?

Please describe it better. Usually the symbols are exported as GPL if
they are considered tightly coupled with the kernel code. So tightly
that basically it is not a interface anymore but part of kernel
internals and therefore any usage of it is a derivative work of Linux
kernel. If this is the case here, please describe in commit msg why
these match this criteria.

Best regards,
Krzysztof