linux-kernel - Re: [PATCH v2] s390/virtio: mark headers as BSD licensed

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Date:   Thu, 9 Nov 2017 09:29:32 +0100
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     Cornelia Huck <cohuck@...hat.com>, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        linux-s390@...r.kernel.org
Subject: Re: [PATCH v2] s390/virtio: mark headers as BSD licensed



On 11/08/2017 08:58 PM, Michael S. Tsirkin wrote:
> On Wed, Nov 08, 2017 at 08:39:11PM +0100, Christian Borntraeger wrote:
>>
>>
>> On 11/08/2017 08:35 PM, Michael S. Tsirkin wrote:
>>> On Wed, Nov 08, 2017 at 07:57:28PM +0100, Christian Borntraeger wrote:
>>>> So what about the following
>>>>
>>>> - leave kvm_virtio.h unchanged and we will delete this file via the s390 tree
>>>
>>> Seems to be used by kvm_virtio.c - are you removing that too?
>>
>> Yes, so sorry my first url for the git.kernel.org was in the wrong subfolder:
>> https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit?h=features&id=7fb2b2d512448cf0e914c4647a1cf02b52263702
>>
>>
>>>
>>>> - change virtio_ccw.h to BSD license. The content of this file is really really trivial
>>>> and it boils down to 2 defines, that can be easily reconstructed by looking at the virtio spec.
>>>> Not even sure if something like this can be copyrighted.
>>>
>>> Yes. What prompted this was Greg's patch.
>>>
>>>>
>>>> For reference the content of this file minus comments is
>>>>
>>>> - snip -
>>>> #define KVM_VIRTIO_CCW_RING_ALIGN 4096
>>>> #define KVM_S390_VIRTIO_CCW_NOTIFY 3
>>>> - snip -
>>>>
>>>>
>>
>> [..]
> 
> 
> So for ccw if both you and Cornelia ACK, we'll be fine I think.
> No one else touched this code.

A patch that changes virtio_ccw.h to a dual gpl2/bsd licence is

Acked-by: Christian Borntraeger <borntraeger@...ibm.com>

as it matches the original intent of the virtio header relicensing
from 2008 while at the same time covers the fact that the whole 
kernel is GPL2.