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Date:   Fri, 24 Nov 2017 17:53:01 +0100
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ibm.com>,
        linux-s390@...r.kernel.org, Thomas Huth <thuth@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.vnet.ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [PATCH v2 2/2] s390/virtio: add BSD license to virtio-ccw

On Fri, Nov 24, 2017 at 06:21:11PM +0200, Michael S. Tsirkin wrote:
> On Fri, Nov 24, 2017 at 03:09:18PM +0100, Heiko Carstens wrote:
> > On Fri, Nov 24, 2017 at 07:21:09AM +0200, Michael S. Tsirkin wrote:
> > > The original intent of the virtio header relicensing
> > > from 2008 was to make sure anyone can implement compatible
> > > devices/drivers. The virtio-ccw was omitted by mistake.
> > > 
> > > We have an ack from the only contributor as well as the
> > > maintainer from IBM, so it's not too late to fix that.
> > > 
> > > Make it dual-licensed with GPLv2, as the whole kernel is GPL2.
> > > 
> > > Acked-by: Christian Borntraeger <borntraeger@...ibm.com>
> > > Acked-by: Cornelia Huck <cohuck@...hat.com>
> > > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > > ---
> > >  arch/s390/include/uapi/asm/virtio-ccw.h | 32 +++++++++++++++++++++++++++-----
> > >  1 file changed, 27 insertions(+), 5 deletions(-)
> > > 
> > > diff --git a/arch/s390/include/uapi/asm/virtio-ccw.h b/arch/s390/include/uapi/asm/virtio-ccw.h
> > > index 967aad3..41c267e 100644
> > > --- a/arch/s390/include/uapi/asm/virtio-ccw.h
> > > +++ b/arch/s390/include/uapi/asm/virtio-ccw.h
> > > @@ -1,14 +1,36 @@
> > > -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> > > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note or BSD-3-Clause */
> > 
> > Could you change this and use a correct SPDX License Expression format, please?
> > 
> >  SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
> 
> Will do, should be consistent with rest of the kernel.
> 
> But I note that WITH has higher precedence than OR.
> And I followed a dual license example from
> https://wiki.spdx.org/view/SPDX_FAQ
> if lower-case or isn't allowed, maybe that should be fixed.

According to https://spdx.org/spdx-specification-21-web-version Appendix IV
and V it looks like that doesn't seem to be allowed.

Please also consider my previous comment below, which you may have missed.

> > > + *
> > > + * This header is BSD licensed so anyone can use the definitions to implement
> > > + * compatible drivers/servers.
> > > + *
> > > + * Redistribution and use in source and binary forms, with or without
> > > + * modification, are permitted provided that the following conditions
> > > + * are met:
> > > + * 1. Redistributions of source code must retain the above copyright
> > > + *    notice, this list of conditions and the following disclaimer.
> > > + * 2. Redistributions in binary form must reproduce the above copyright
> > > + *    notice, this list of conditions and the following disclaimer in the
> > > + *    documentation and/or other materials provided with the distribution.
> > > + * 3. Neither the name of IBM nor the names of its contributors
> > > + *    may be used to endorse or promote products derived from this software
> > > + *    without specific prior written permission.
> > > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
> > > + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> > > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> > > + * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
> > > + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> > > + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> > > + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> > > + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> > > + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> > > + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> > > + * SUCH DAMAGE.
> > 
> > Is there any reason to add the whole BSD 3 clause license text? I'd prefer
> > if it would be just the simple new SPDX-License-Identifier above.

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