linux-kernel - Re: Licensing of include/linux/hash.h

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Date:   Mon, 11 Feb 2019 15:51:32 +0100
From:   Ulrich Mueller <ulm@...too.org>
To:     Domenico Andreoli <cavok@...ian.org>
Cc:     Kristian Fiskerstrand <k_f@...too.org>,
        Ben Finney <bignose@...ian.org>,
        Nadia Yvette Chambers <nyc@...omorphy.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        919356@...s.debian.org, debian-legal@...ts.debian.org,
        linux-kernel@...r.kernel.org,
        Martin Steigerwald <martin.steigerwald@...act.de>,
        Jens Axboe <jens.axboe@...cle.com>,
        Rik van Riel <riel@...riel.com>
Subject: Re: Licensing of include/linux/hash.h

>>>>> On Mon, 11 Feb 2019, Ulrich Mueller wrote:

>>>>> On Mon, 11 Feb 2019, Domenico Andreoli wrote:
>> On Mon, Feb 11, 2019 at 12:08:32AM +0100, Kristian Fiskerstrand wrote:
>>> It was [pointed out] by one of our license group that [hash.h]  is the
>>> same that has a GPL-2+ in [fio] which has a signed-off-by.
>>> 
>>> References:
>>> [pointed out]
>>> https://bugs.gentoo.org/677586#c1
>>> 
>>> [hash.h]
>>> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/fio.git/commit/hash.h?id=bdc7211e190482f0c17c109a0d90834a6611be1c

>> Yes, the Signed-off-by is from Jens Axboe (in CC) but he's not the
>> original author, I guess he just copied the file as Arnaldo did. The
>> file he committed has not any reference to the license.

>>> [fio]
>>> https://metadata.ftp-master.debian.org/changelogs/main/f/fio/fio_3.12-2_copyright

>> I'm afraid that this entry in wrong. I'll seek confirmation with
>> Martin Steigerwald.

> Not sure if this will help, but hash.h originally appeared in
> Linux 2.5.7. In the following commit one can see that most of its code
> was moved or copied from mm/filemap.c:
> https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/?id=882ad449046cec136c484dd2b3659fb4c683e0a3

> filemap.c has a copyright line by Linus, but git blame shows that
> the relevant code was added in 2002 with a commit by Rik van Riel:
> https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/?id=e5191c50d12621e04f8bc247dcb6a0f4ad76ae26

> The relevant thread in LKML is here:
> https://lkml.org/lkml/2002/2/18/1970

Sorry, that link should read:
https://lkml.org/lkml/2002/2/18/197