On Wed, May 25 2022 at 09:57, Luis Chamberlain wrote: > On Mon, May 23, 2022 at 11:22:36PM +0200, Thomas Gleixner wrote: >> This paragraph is not really understandable for Joe Developer. >> >> copyleft-next-0.3.1 is explicitly compatible with GPLv2 (or later) and >> can therefore be used for kernel code. Though the best and recommended >> practice is to express this in the SPDX license identifier by >> licensing the code under both licenses expressed by the OR operator. >> >> Hmm? > > Let me try clarifying this further, how about: > > copyleft-next-0.3.1 is explicitly compatible with GPLv2 (or later) and > can therefore be used for kernel code. Despite this, if you use > copyleft-next-0.3.1 on Linux, the recommended practice is to express > dual licensing with GPL using in the SPDX license identifiers by > using by the OR operator. 'using in the ..' ? and 'by using by' is off by one 'by' :) I'm not seeing how that clarifies stuff further. I might be biased, but the version I suggested is crystal clear. >> > + To use the copyleft-next-0.3.1 license put the following SPDX tag/value >> > + pair into a comment according to the placement guidelines in the >> > + licensing rules documentation: >> > + SPDX-License-Identifier: GPL-2.0 OR copyleft-next-0.3.1 >> > + SPDX-License-Identifier: GPL-2.0-only OR copyleft-next 0.3.1 >> > + SPDX-License-Identifier: GPL-2.0+ OR copyleft-next-0.3.1 >> > + SPDX-License-Identifier: GPL-2.0-or-later OR copyleft-next-0.3.1 >> >> Please don't propagate the GPL-2.0 and GPL-2.0+ tags. They are >> outdated (still valid) in the SPDX spec, which reminds me that I should >> update the relevant documentation... > > OK thanks for the recommendation, I'll leave it at: > > + SPDX-License-Identifier: GPL-2.0 OR copyleft-next-0.3.1 SPDX-License-Identifier: GPL-2.0-only OR copyleft-next-0.3.1 please. See my previous reply quoted above. > + SPDX-License-Identifier: GPL-2.0-or-later OR copyleft-next-0.3.1 Thanks, tglx