linux-kernel - Re: Request for contributor approval: Relicensing rseq selftests to MIT

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Message-ID: <0d52ddc1-7bd6-2a37-5fdf-d00ce42eae4f@efficios.com>
Date:   Mon, 6 Feb 2023 13:58:18 -0500
From:   Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Shuah Khan <shuah@...nel.org>,
        Michael Jeanson <mjeanson@...icios.com>,
        Peter Oskolkov <posk@...k.io>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Paul Burton <paulburton@...nel.org>,
        Sabyasachi Gupta <sabyasachi.linux@...il.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Vincent Chen <vincent.chen@...ive.com>,
        Will Deacon <will@...nel.org>,
        Xingxing Su <suxingxing@...ngson.cn>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: Request for contributor approval: Relicensing rseq selftests to
 MIT

On 2023-02-06 13:36, Mathieu Desnoyers wrote:
> Hi,
> 
> I would like to get contributor approval to relicense the rseq selftests 
> within the Linux kernel and the librseq project to MIT. This will make 
> it easier to use librseq from statically built applications, and I wish 
> to continue sharing code between the kernel rseq selftests and librseq.
> 
> Allowing use of rseq application headers from statically built 
> applications was the intent from the beginning, but it turns out that 
> having the rseq.c initialization code under LGPL2.1 makes it harder than 
> it should be for users.
> 
> The current contributor summary commit-wise under
> tools/testing/selftests/rseq is:
> 
>     269  Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
>       6  Michael Ellerman <mpe@...erman.id.au>
>       5  Shuah Khan <skhan@...uxfoundation.org>
>       3  Michael Jeanson <mjeanson@...icios.com>
>       3  Peter Oskolkov <posk@...gle.com>
>       2  Martin Schwidefsky <schwidefsky@...ibm.com>

I am having issues reaching Martin Schwidefsky. In this case it's a one-liner
contribution to a header which is going from LGPL2.1 OR MIT to MIT, which is
fine because it just removes one of the pre-allowed licenses, thus removing
some redundancy.

[ CCing Heiko Carstens ]

Rerefence:

commit 3d4d1f05bc990f240d66b0ffaf7121397e14df19
Author: Martin Schwidefsky <schwidefsky@...ibm.com>
Date:   Mon Apr 29 11:27:58 2019 -0400

     rseq/selftests: s390: use trap4 for RSEQ_SIG
     
     Use trap4 as the guard instruction for the restartable sequence abort
     handler.
     
     Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
     Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
     Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>

Thanks,

Mathieu

>       1  Masahiro Yamada <masahiroy@...nel.org>
>       1  Paul Burton <paulburton@...nel.org>
>       1  Sabyasachi Gupta <sabyasachi.linux@...il.com>
>       1  Vasily Gorbik <gor@...ux.ibm.com>
>       1  Vincent Chen <vincent.chen@...ive.com>
>       1  Will Deacon <will@...nel.org>
>       1  Xingxing Su <suxingxing@...ngson.cn>
> 
> Header files are currently dual-licensed LGPL2.1/MIT, which is
> somewhat redundant with plain MIT.
> 
> rseq.c was licensed under LGPL2.1. Relicencing it to MIT will facilitate 
> its integration into statically built applications.
> 
> In order to facilitate eventual code sharing between tests and the
> library implementation, I would like to relicense the tests from LGPL2.1 
> to MIT as well.
> 
> Many of the contributions are trivial, but I prefer to kindly ask for 
> approval nevertheless.
> 
> Thanks,
> 
> Mathieu
> 

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com