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authorThorsten Leemhuis <linux@leemhuis.info>2020-12-04 07:43:48 +0100
committerJonathan Corbet <corbet@lwn.net>2020-12-08 10:33:27 -0700
commitbc41a7f3646980ef8b6a3ed20fc50c27e70b9fa5 (patch)
treed8a7b5fda566d296eb00762c52e2c02024fe5383 /LICENSES/dual/CC-BY-4.0
parent751d5b27418345f56ee0bb6ce9da2988a228de10 (diff)
LICENSES: Add the CC-BY-4.0 license
Add the full text of the CC-BY-4.0 license to the kernel tree as well as the required tags for reference and tooling. The license text was copied directly from the following url, but for clarification a 'Creative Commons' was added before 'Attribution 4.0 International' in the first line: https://creativecommons.org/licenses/by/4.0/legalcode.txt CC-BY-4.0 is GPLv2 compatible, but when for example used for the kernel's documentation it can easily happen that sphinx during processing combines it with text or code from files using a more restrictive license[1]. This bears pitfalls, hence point that risk out and suggest to only use this license in combination with the GPLv2. [1] https://lkml.kernel.org/r/20201201144314.GA14256@lst.de Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/7115b6c20ae3e6db0370fe4002dd586011205e1c.1607063223.git.linux@leemhuis.info Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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+Valid-License-Identifier: CC-BY-4.0
+SPDX-URL: https://spdx.org/licenses/CC-BY-4.0
+Usage-Guide:
+ Do NOT use this license for code, but it's acceptable for content like artwork
+ or documentation. When using it for the latter, it's best to use it together
+ with a GPL2 compatible license using "OR", as CC-BY-4.0 texts processed by
+ the kernel's build system might combine it with content taken from more
+ restrictive licenses.
+ To use the Creative Commons Attribution 4.0 International license put
+ the following SPDX tag/value pair into a comment according to the
+ placement guidelines in the licensing rules documentation:
+ SPDX-License-Identifier: CC-BY-4.0
+License-Text:
+
+Creative Commons Attribution 4.0 International
+
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