On Wed, Feb 21, 2018 at 11:42:23AM +0200, Oleksandr Andrushchenko wrote:
On 02/21/2018 11:17 AM, Roger Pau Monné wrote:
On Wed, Feb 21, 2018 at 10:03:34AM +0200, Oleksandr Andrushchenko wrote:
--- /dev/null +++ b/drivers/gpu/drm/xen/xen_drm_front.c @@ -0,0 +1,83 @@ +/*
- Xen para-virtual DRM device
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
Most Xen drivers in Linux use a dual GPL/BSD license, so that they can be imported into other non GPL OSes:
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation; or, when distributed separately from the Linux kernel or incorporated into other software packages, subject to the following license:
Permission is hereby granted, free of charge, to any person obtaining a copy of this source file (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
IMO it would be good to release this driver under the same license, so it can be incorporated into other OSes.
I am in any way expert in licensing, but the above seems to be /* SPDX-License-Identifier: (GPL-2.0 OR MIT) */ At least this is what I see at [1] for MIT. Could you please tell which license(s) as listed at [1] would be appropriate for Xen drivers in terms of how it is expected to appear in the kernel code, e.g. expected SPDX-License-Identifier?
I would be fine with anything MIT/BSD-*/Apache-* like. In the Xen community we have generally done dual GPL-2.0 MIT, so your proposed tag looks fine IMO (I would also personally be fine with MIT/BSD-*/Apache-* only).
The point is that it would be good to have the code under a more permissive license so it can be integrated into non GPL OSes in the future if needed, and that your code could be used as a reference for that.
Thanks, Roger.