update license stuff

120 files changed, 384 insertions, 785 deletions

diff --git a/COPYING b/COPYING
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--- a/COPYING
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@@ -1,674 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
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-you modify it: responsibilities to respect the freedom of others.
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-  For example, if you distribute copies of such a program, whether
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-that there is no warranty for this free software.  For both users' and
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-  The precise terms and conditions for copying, distribution and
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-
-                       TERMS AND CONDITIONS
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-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    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 3 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.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..36d8515
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,220 @@
+                      copyleft-next 0.3.1 ("this License")
+                            Release date: 2016-04-29
+
+1. License Grants; No Trademark License
+
+   Subject to the terms of this License, I grant You:
+
+   a) A non-exclusive, worldwide, perpetual, royalty-free, irrevocable
+      copyright license, to reproduce, Distribute, prepare derivative works
+      of, publicly perform and publicly display My Work.
+
+   b) A non-exclusive, worldwide, perpetual, royalty-free, irrevocable
+      patent license under Licensed Patents to make, have made, use, sell,
+      offer for sale, and import Covered Works.
+
+   This License does not grant any rights in My name, trademarks, service
+   marks, or logos.
+
+2. Distribution: General Conditions
+
+   You may Distribute Covered Works, provided that You (i) inform
+   recipients how they can obtain a copy of this License; (ii) satisfy the
+   applicable conditions of sections 3 through 6; and (iii) preserve all
+   Legal Notices contained in My Work (to the extent they remain
+   pertinent). "Legal Notices" means copyright notices, license notices,
+   license texts, and author attributions, but does not include logos,
+   other graphical images, trademarks or trademark legends.
+
+3. Conditions for Distributing Derived Works; Outbound GPL Compatibility
+
+   If You Distribute a Derived Work, You must license the entire Derived
+   Work as a whole under this License, with prominent notice of such
+   licensing. This condition may not be avoided through such means as
+   separate Distribution of portions of the Derived Work.
+
+   If the Derived Work includes material licensed under the GPL, You may
+   instead license the Derived Work under the GPL.
+   
+4. Condition Against Further Restrictions; Inbound License Compatibility
+
+   When Distributing a Covered Work, You may not impose further
+   restrictions on the exercise of rights in the Covered Work granted under
+   this License. This condition is not excused merely because such
+   restrictions result from Your compliance with conditions or obligations
+   extrinsic to this License (such as a court order or an agreement with a
+   third party).
+
+   However, You may Distribute a Covered Work incorporating material
+   governed by a license that is both OSI-Approved and FSF-Free as of the
+   release date of this License, provided that compliance with such
+   other license would not conflict with any conditions stated in other
+   sections of this License.
+
+5. Conditions for Distributing Object Code
+
+   You may Distribute an Object Code form of a Covered Work, provided that
+   you accompany the Object Code with a URL through which the Corresponding
+   Source is made available, at no charge, by some standard or customary
+   means of providing network access to source code.
+
+   If you Distribute the Object Code in a physical product or tangible
+   storage medium ("Product"), the Corresponding Source must be available
+   through such URL for two years from the date of Your most recent
+   Distribution of the Object Code in the Product. However, if the Product
+   itself contains or is accompanied by the Corresponding Source (made
+   available in a customarily accessible manner), You need not also comply
+   with the first paragraph of this section.
+
+   Each direct and indirect recipient of the Covered Work from You is an
+   intended third-party beneficiary of this License solely as to this
+   section 5, with the right to enforce its terms.
+
+6. Symmetrical Licensing Condition for Upstream Contributions
+
+   If You Distribute a work to Me specifically for inclusion in or
+   modification of a Covered Work (a "Patch"), and no explicit licensing
+   terms apply to the Patch, You license the Patch under this License, to
+   the extent of Your copyright in the Patch. This condition does not
+   negate the other conditions of this License, if applicable to the Patch.
+
+7. Nullification of Copyleft/Proprietary Dual Licensing
+
+   If I offer to license, for a fee, a Covered Work under terms other than
+   a license that is OSI-Approved or FSF-Free as of the release date of this
+   License or a numbered version of copyleft-next released by the
+   Copyleft-Next Project, then the license I grant You under section 1 is no
+   longer subject to the conditions in sections 3 through 5.
+
+8. Copyleft Sunset
+
+   The conditions in sections 3 through 5 no longer apply once fifteen
+   years have elapsed from the date of My first Distribution of My Work
+   under this License.
+
+9. Pass-Through
+
+   When You Distribute a Covered Work, the recipient automatically receives
+   a license to My Work from Me, subject to the terms of this License.
+
+10. Termination
+
+    Your license grants under section 1 are automatically terminated if You
+
+    a) fail to comply with the conditions of this License, unless You cure
+       such noncompliance within thirty days after becoming aware of it, or
+
+    b) initiate a patent infringement litigation claim (excluding
+       declaratory judgment actions, counterclaims, and cross-claims)
+       alleging that any part of My Work directly or indirectly infringes
+       any patent.
+
+    Termination of Your license grants extends to all copies of Covered
+    Works You subsequently obtain. Termination does not terminate the
+    rights of those who have received copies or rights from You subject to
+    this License.
+
+    To the extent permission to make copies of a Covered Work is necessary
+    merely for running it, such permission is not terminable.
+
+11. Later License Versions
+
+    The Copyleft-Next Project may release new versions of copyleft-next,
+    designated by a distinguishing version number ("Later Versions").
+    Unless I explicitly remove the option of Distributing Covered Works
+    under Later Versions, You may Distribute Covered Works under any Later
+    Version.
+
+** 12. No Warranty                                                       **
+**                                                                       **
+**     My Work is provided "as-is", without warranty. You bear the risk  **
+**     of using it. To the extent permitted by applicable law, each      **
+**     Distributor of My Work excludes the implied warranties of title,  **
+**     merchantability, fitness for a particular purpose and             **
+**     non-infringement.                                                 **
+
+** 13. Limitation of Liability                                           **
+**                                                                       **
+**     To the extent permitted by applicable law, in no event will any   **
+**     Distributor of My Work be liable to You for any damages           **
+**     whatsoever, whether direct, indirect, special, incidental, or     **
+**     consequential damages, whether arising under contract, tort       **
+**     (including negligence), or otherwise, even where the Distributor  **
+**     knew or should have known about the possibility of such damages.  **
+
+14. Severability
+
+    The invalidity or unenforceability of any provision of this License
+    does not affect the validity or enforceability of the remainder of
+    this License. Such provision is to be reformed to the minimum extent
+    necessary to make it valid and enforceable.
+
+15. Definitions
+
+    "Copyleft-Next Project" means the project that maintains the source
+    code repository at <https://github.com/copyleft-next/copyleft-next.git/>
+    as of the release date of this License.
+
+    "Corresponding Source" of a Covered Work in Object Code form means (i)
+    the Source Code form of the Covered Work; (ii) all scripts,
+    instructions and similar information that are reasonably necessary for
+    a skilled developer to generate such Object Code from the Source Code
+    provided under (i); and (iii) a list clearly identifying all Separate
+    Works (other than those provided in compliance with (ii)) that were
+    specifically used in building and (if applicable) installing the
+    Covered Work (for example, a specified proprietary compiler including
+    its version number). Corresponding Source must be machine-readable.
+
+    "Covered Work" means My Work or a Derived Work.
+
+    "Derived Work" means a work of authorship that copies from, modifies,
+    adapts, is based on, is a derivative work of, transforms, translates or
+    contains all or part of My Work, such that copyright permission is
+    required. The following are not Derived Works: (i) Mere Aggregation;
+    (ii) a mere reproduction of My Work; and (iii) if My Work fails to
+    explicitly state an expectation otherwise, a work that merely makes
+    reference to My Work.
+
+    "Distribute" means to distribute, transfer or make a copy available to
+    someone else, such that copyright permission is required.
+
+    "Distributor" means Me and anyone else who Distributes a Covered Work.
+
+    "FSF-Free" means classified as 'free' by the Free Software Foundation.
+
+    "GPL" means a version of the GNU General Public License or the GNU
+    Affero General Public License.
+
+    "I"/"Me"/"My" refers to the individual or legal entity that places My
+    Work under this License. "You"/"Your" refers to the individual or legal
+    entity exercising rights in My Work under this License. A legal entity
+    includes each entity that controls, is controlled by, or is under
+    common control with such legal entity. "Control" means (a) the power to
+    direct the actions of such legal entity, whether by contract or
+    otherwise, or (b) ownership of more than fifty percent of the
+    outstanding shares or beneficial ownership of such legal entity.
+
+    "Licensed Patents" means all patent claims licensable royalty-free by
+    Me, now or in the future, that are necessarily infringed by making,
+    using, or selling My Work, and excludes claims that would be infringed
+    only as a consequence of further modification of My Work.
+
+    "Mere Aggregation" means an aggregation of a Covered Work with a
+    Separate Work.
+
+    "My Work" means the particular work of authorship I license to You
+    under this License.
+
+    "Object Code" means any form of a work that is not Source Code.
+
+    "OSI-Approved" means approved as 'Open Source' by the Open Source
+    Initiative.
+
+    "Separate Work" means a work that is separate from and independent of a
+    particular Covered Work and is not by its nature an extension or
+    enhancement of the Covered Work, and/or a runtime library, standard
+    library or similar component that is used to generate an Object Code
+    form of a Covered Work.
+
+    "Source Code" means the preferred form of a work for making
+    modifications to it.
diff --git a/Makefile b/Makefile
index ef2cceb..dfc1c46 100644
--- a/Makefile
+++ b/Makefile
@@ -79,8 +79,6 @@ INIT_LD		!= ./scripts/gen-deps --init --link "$(INIT_LINK).S"
 
 $(INIT_LD): kernel.bin
 
-lint: $(INIT_OBJECTS:.o=.o.l) $(KERNEL_OBJECTS:.o=.o.l)
-
 init.elf: $(INIT_OBJECTS) $(INIT_LD)
 	$(GENELF) -T $(INIT_LD) $(INIT_OBJECTS) -o init.elf $(LINK_FLAGS)
 
@@ -96,15 +94,25 @@ kernel.bin: kernel.elf
 kmi.bin: init.bin kernel.bin
 	cat init.bin kernel.bin > kmi.bin
 
+.PHONY:
+lint: $(INIT_OBJECTS:.o=.o.l) $(KERNEL_OBJECTS:.o=.o.l)
+
+.PHONY: format
 format:
 	find arch lib common include -iname '*.[ch]' |\
 		xargs -n 10 -P 0 uncrustify -c uncrustify.conf --no-backup -F -
 
+.PHONY: license
+license:
+	find arch lib common include -iname '*.[ch]' |\
+		xargs -n 10 -P 0 ./scripts/license
+
 .PHONY: docs
 docs:
 	./scripts/warn-undocumented
 	doxygen docs/doxygen.conf
 
+# bmake didn't seem to have the -f flag on by default
 RM	?= rm -f
 
 .PHONY: clean
diff --git a/arch/riscv64/asm/asm-offsets.c b/arch/riscv64/asm/asm-offsets.c
index 4bc1179..7a8ea01 100644
--- a/arch/riscv64/asm/asm-offsets.c
+++ b/arch/riscv64/asm/asm-offsets.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/asm/source.mk b/arch/riscv64/asm/source.mk
index b9a64bc..86cd367 100644
--- a/arch/riscv64/asm/source.mk
+++ b/arch/riscv64/asm/source.mk
@@ -3,11 +3,16 @@ OFFSET_SOURCE	:= $(ARCH_SOURCE)/asm/asm-offsets.c
 
 $(OFFSET_HEADER): $(OFFSET_SOURCE)
 	mkdir -p $$(dirname $(OFFSET_HEADER))
-	echo "#ifndef KMI_ASM_OFFSETS_H" > $(OFFSET_HEADER)
+	echo "/* SPDX-License-Identifier: copyleft-next-0.3.1 */" >> $(OFFSET_HEADER)
+	echo "/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */" >> $(OFFSET_HEADER)
+	echo "/* This file is autogenerated, see arch/riscv64/asm/source.mk. */" >> $(OFFSET_HEADER)
+	echo "/* As such, license and copyright info is sort of meaningless" >> $(OFFSET_HEADER)
+	echo " * but at least the build system doesn't crap out warnings */" >> $(OFFSET_HEADER)
+	echo "#ifndef KMI_ASM_OFFSETS_H" >> $(OFFSET_HEADER)
 	echo "#define KMI_ASM_OFFSETS_H" >> $(OFFSET_HEADER)
 	echo "/**" >> $(OFFSET_HEADER)
 	echo " * @file asm-offsets.h" >> $(OFFSET_HEADER)
-	echo " * This comment is to shut up warnings." >> $(OFFSET_HEADER)
+	echo " * This comment is also to shut up warnings." >> $(OFFSET_HEADER)
 	echo " */" >> $(OFFSET_HEADER)
 	$(COMPILER) $(CFLAGS) $(INCLUDE_FLAGS) -S $(OFFSET_SOURCE) -o - |\
 		awk '($$1 == "#->") { print "#define " $$2 " " $$3 }' >> $(OFFSET_HEADER)
diff --git a/arch/riscv64/conf/init-link.S b/arch/riscv64/conf/init-link.S
index f827245..600304f 100644
--- a/arch/riscv64/conf/init-link.S
+++ b/arch/riscv64/conf/init-link.S
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 OUTPUT_ARCH(riscv)
diff --git a/arch/riscv64/conf/init.c b/arch/riscv64/conf/init.c
index 3a1a517..b2f4024 100644
--- a/arch/riscv64/conf/init.c
+++ b/arch/riscv64/conf/init.c
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 /**
  * Header for silencing scripts/warn-undocumented
  *
diff --git a/arch/riscv64/conf/kernel-link.S b/arch/riscv64/conf/kernel-link.S
index 2f000c9..181f49d 100644
--- a/arch/riscv64/conf/kernel-link.S
+++ b/arch/riscv64/conf/kernel-link.S
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 OUTPUT_ARCH(riscv)
diff --git a/arch/riscv64/conf/s.S b/arch/riscv64/conf/s.S
index 7dbaf4f..aff9b40 100644
--- a/arch/riscv64/conf/s.S
+++ b/arch/riscv64/conf/s.S
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 .text
diff --git a/arch/riscv64/config.h b/arch/riscv64/config.h
index 86f591a..1d4a6e0 100644
--- a/arch/riscv64/config.h
+++ b/arch/riscv64/config.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_CONFIG_H
diff --git a/arch/riscv64/include/arch.h b/arch/riscv64/include/arch.h
index d30232c..c75377b 100644
--- a/arch/riscv64/include/arch.h
+++ b/arch/riscv64/include/arch.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_ARCH_H
diff --git a/arch/riscv64/include/cpu.h b/arch/riscv64/include/cpu.h
index f8131ae..9c92349 100644
--- a/arch/riscv64/include/cpu.h
+++ b/arch/riscv64/include/cpu.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_CPU_H
diff --git a/arch/riscv64/include/irq.h b/arch/riscv64/include/irq.h
index 574b6d2..248cec3 100644
--- a/arch/riscv64/include/irq.h
+++ b/arch/riscv64/include/irq.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_IRQ_H
diff --git a/arch/riscv64/include/lock.h b/arch/riscv64/include/lock.h
index cbdad63..f66ec16 100644
--- a/arch/riscv64/include/lock.h
+++ b/arch/riscv64/include/lock.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_LOCK_H
diff --git a/arch/riscv64/include/pmem.h b/arch/riscv64/include/pmem.h
index ae23ca5..7101757 100644
--- a/arch/riscv64/include/pmem.h
+++ b/arch/riscv64/include/pmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_PMEM_H
diff --git a/arch/riscv64/include/proc.h b/arch/riscv64/include/proc.h
index dac57ed..9adae84 100644
--- a/arch/riscv64/include/proc.h
+++ b/arch/riscv64/include/proc.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_PROC_H
diff --git a/arch/riscv64/include/tcb.h b/arch/riscv64/include/tcb.h
index f3e4cd0..33e8fad 100644
--- a/arch/riscv64/include/tcb.h
+++ b/arch/riscv64/include/tcb.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef ARCH_RISCV_TCB_H
diff --git a/arch/riscv64/include/timer.h b/arch/riscv64/include/timer.h
index 33e02f8..f02ffa4 100644
--- a/arch/riscv64/include/timer.h
+++ b/arch/riscv64/include/timer.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_TIMER_H
diff --git a/arch/riscv64/include/types.h b/arch/riscv64/include/types.h
index bcf96c6..68d312d 100644
--- a/arch/riscv64/include/types.h
+++ b/arch/riscv64/include/types.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_TYPES_H
diff --git a/arch/riscv64/include/vmem.h b/arch/riscv64/include/vmem.h
index 5defc5a..ed99843 100644
--- a/arch/riscv64/include/vmem.h
+++ b/arch/riscv64/include/vmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_VMAP_H
diff --git a/arch/riscv64/init/init.c b/arch/riscv64/init/init.c
index a306b59..08462f6 100644
--- a/arch/riscv64/init/init.c
+++ b/arch/riscv64/init/init.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/init/start.S b/arch/riscv64/init/start.S
index e5b6ced..b54f685 100644
--- a/arch/riscv64/init/start.S
+++ b/arch/riscv64/init/start.S
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 .section .init.start
diff --git a/arch/riscv64/kernel/cpu.c b/arch/riscv64/kernel/cpu.c
index 629e2db..44950ea 100644
--- a/arch/riscv64/kernel/cpu.c
+++ b/arch/riscv64/kernel/cpu.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/csr.h b/arch/riscv64/kernel/csr.h
index 2dda0cb..9a23127 100644
--- a/arch/riscv64/kernel/csr.h
+++ b/arch/riscv64/kernel/csr.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_CSR_H
diff --git a/arch/riscv64/kernel/entry.S b/arch/riscv64/kernel/entry.S
index b4308b4..fe25854 100644
--- a/arch/riscv64/kernel/entry.S
+++ b/arch/riscv64/kernel/entry.S
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #include "../kernel/gen/asm-offsets.h"
diff --git a/arch/riscv64/kernel/irq.c b/arch/riscv64/kernel/irq.c
index 023653e..698a834 100644
--- a/arch/riscv64/kernel/irq.c
+++ b/arch/riscv64/kernel/irq.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/main.c b/arch/riscv64/kernel/main.c
index 7e6fbf6..01b8957 100644
--- a/arch/riscv64/kernel/main.c
+++ b/arch/riscv64/kernel/main.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/pages.h b/arch/riscv64/kernel/pages.h
index 28478a7..0b03199 100644
--- a/arch/riscv64/kernel/pages.h
+++ b/arch/riscv64/kernel/pages.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_PAGES_H
diff --git a/arch/riscv64/kernel/pmem.c b/arch/riscv64/kernel/pmem.c
index 3076dc5..945cb38 100644
--- a/arch/riscv64/kernel/pmem.c
+++ b/arch/riscv64/kernel/pmem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/power.c b/arch/riscv64/kernel/power.c
index 43d1b4d..49fc9c5 100644
--- a/arch/riscv64/kernel/power.c
+++ b/arch/riscv64/kernel/power.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/proc.c b/arch/riscv64/kernel/proc.c
index 9b28fc3..2cc3f36 100644
--- a/arch/riscv64/kernel/proc.c
+++ b/arch/riscv64/kernel/proc.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/regs.h b/arch/riscv64/kernel/regs.h
index da62a74..cc9ef1d 100644
--- a/arch/riscv64/kernel/regs.h
+++ b/arch/riscv64/kernel/regs.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_REGS_H
diff --git a/arch/riscv64/kernel/sbi.c b/arch/riscv64/kernel/sbi.c
index a11fab9..1a1f54a 100644
--- a/arch/riscv64/kernel/sbi.c
+++ b/arch/riscv64/kernel/sbi.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/sbi.h b/arch/riscv64/kernel/sbi.h
index 8484d7c..9b3ffbc 100644
--- a/arch/riscv64/kernel/sbi.h
+++ b/arch/riscv64/kernel/sbi.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_RISCV_SBI_H
diff --git a/arch/riscv64/kernel/timer.c b/arch/riscv64/kernel/timer.c
index 015a230..c7752f8 100644
--- a/arch/riscv64/kernel/timer.c
+++ b/arch/riscv64/kernel/timer.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/arch/riscv64/kernel/vmem.c b/arch/riscv64/kernel/vmem.c
index 72e069b..6fd7069 100644
--- a/arch/riscv64/kernel/vmem.c
+++ b/arch/riscv64/kernel/vmem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/bits.c b/common/bits.c
index cdb3224..6462d21 100644
--- a/common/bits.c
+++ b/common/bits.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/canary.c b/common/canary.c
index e6210a4..4f1f8ba 100644
--- a/common/canary.c
+++ b/common/canary.c
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #include <kmi/canary.h>
 #include <kmi/mem.h>
 
diff --git a/common/debug.c b/common/debug.c
index 891e1c7..1bc87f7 100644
--- a/common/debug.c
+++ b/common/debug.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/dispatch.c b/common/dispatch.c
index f5d5d2e..62f10a9 100644
--- a/common/dispatch.c
+++ b/common/dispatch.c
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #include <kmi/uapi.h>
 #include <kmi/ipi.h>
 
diff --git a/common/dmem.c b/common/dmem.c
index 5a671fd..b903cbe 100644
--- a/common/dmem.c
+++ b/common/dmem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/elf.c b/common/elf.c
index eb9cb97..da47502 100644
--- a/common/elf.c
+++ b/common/elf.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/fdt.c b/common/fdt.c
index 3fc3010..356c669 100644
--- a/common/fdt.c
+++ b/common/fdt.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/initrd.c b/common/initrd.c
index 716231b..4bb25e9 100644
--- a/common/initrd.c
+++ b/common/initrd.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/ipi.c b/common/ipi.c
index 9629d8a..a5435a3 100644
--- a/common/ipi.c
+++ b/common/ipi.c
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #include <kmi/ipi.h>
 #include <arch/cpu.h>
 
diff --git a/common/main.c b/common/main.c
index 6de5433..5248d2a 100644
--- a/common/main.c
+++ b/common/main.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/mem.c b/common/mem.c
index 03c92fa..69ba4d6 100644
--- a/common/mem.c
+++ b/common/mem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/mem_nodes.c b/common/mem_nodes.c
index a991ebf..358a68d 100644
--- a/common/mem_nodes.c
+++ b/common/mem_nodes.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/mem_regions.c b/common/mem_regions.c
index b94036d..9468774 100644
--- a/common/mem_regions.c
+++ b/common/mem_regions.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/nodes.c b/common/nodes.c
index 31819fe..5edb783 100644
--- a/common/nodes.c
+++ b/common/nodes.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/pmem.c b/common/pmem.c
index b09f483..16e6adf 100644
--- a/common/pmem.c
+++ b/common/pmem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/proc.c b/common/proc.c
index 9bd07da..0f0c7f8 100644
--- a/common/proc.c
+++ b/common/proc.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/sp_tree.c b/common/sp_tree.c
index e2046ff..9f69158 100644
--- a/common/sp_tree.c
+++ b/common/sp_tree.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/string.c b/common/string.c
index d0bf877..6685c08 100644
--- a/common/string.c
+++ b/common/string.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/tcb.c b/common/tcb.c
index 85f5057..a9e08b5 100644
--- a/common/tcb.c
+++ b/common/tcb.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/timer.c b/common/timer.c
index 9ab48a1..50ec237 100644
--- a/common/timer.c
+++ b/common/timer.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/uapi/cap.c b/common/uapi/cap.c
index 8fb0ff3..825022a 100644
--- a/common/uapi/cap.c
+++ b/common/uapi/cap.c
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #include <kmi/uapi.h>
 #include <kmi/caps.h>
 #include <kmi/tcb.h>
diff --git a/common/uapi/conf.c b/common/uapi/conf.c
index b5f0046..ba48d0f 100644
--- a/common/uapi/conf.c
+++ b/common/uapi/conf.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/uapi/dispatch.c b/common/uapi/dispatch.c
index 70c2f4b..8db7982 100644
--- a/common/uapi/dispatch.c
+++ b/common/uapi/dispatch.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/uapi/ipc.c b/common/uapi/ipc.c
index f47b300..1498cfb 100644
--- a/common/uapi/ipc.c
+++ b/common/uapi/ipc.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/uapi/mem.c b/common/uapi/mem.c
index d760cf8..01bf470 100644
--- a/common/uapi/mem.c
+++ b/common/uapi/mem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/uapi/proc.c b/common/uapi/proc.c
index 876c839..2f1a638 100644
--- a/common/uapi/proc.c
+++ b/common/uapi/proc.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/uapi/timers.c b/common/uapi/timers.c
index ace106f..0d0ac50 100644
--- a/common/uapi/timers.c
+++ b/common/uapi/timers.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/common/vmem.c b/common/vmem.c
index d9c0c2a..e90d27b 100644
--- a/common/vmem.c
+++ b/common/vmem.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/include/arch/arch.h b/include/arch/arch.h
index 406a285..c1d7936 100644
--- a/include/arch/arch.h
+++ b/include/arch/arch.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_H
diff --git a/include/arch/cpu.h b/include/arch/cpu.h
index d4bf435..d142433 100644
--- a/include/arch/cpu.h
+++ b/include/arch/cpu.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_CPU_H
diff --git a/include/arch/irq.h b/include/arch/irq.h
index b2dcd0a..72b998e 100644
--- a/include/arch/irq.h
+++ b/include/arch/irq.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_IRQ_H
diff --git a/include/arch/lock.h b/include/arch/lock.h
index 13d010a..2a94fbf 100644
--- a/include/arch/lock.h
+++ b/include/arch/lock.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_LOCK_H
diff --git a/include/arch/pmem.h b/include/arch/pmem.h
index 276d604..03a8172 100644
--- a/include/arch/pmem.h
+++ b/include/arch/pmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_PMEM_H
diff --git a/include/arch/proc.h b/include/arch/proc.h
index 4bd0e20..493b168 100644
--- a/include/arch/proc.h
+++ b/include/arch/proc.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_PROC_H
diff --git a/include/arch/tcb.h b/include/arch/tcb.h
index c295d89..0687954 100644
--- a/include/arch/tcb.h
+++ b/include/arch/tcb.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_TCB_H
diff --git a/include/arch/timer.h b/include/arch/timer.h
index df8e242..1eab69a 100644
--- a/include/arch/timer.h
+++ b/include/arch/timer.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_TIMER_H
diff --git a/include/arch/types.h b/include/arch/types.h
index 58f9ef4..7b1f07f 100644
--- a/include/arch/types.h
+++ b/include/arch/types.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_TYPES_H
diff --git a/include/arch/vmem.h b/include/arch/vmem.h
index 047c615..3f73a8f 100644
--- a/include/arch/vmem.h
+++ b/include/arch/vmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ARCH_PAGES_H
diff --git a/include/fdt.h b/include/fdt.h
index b270fce..b22b8ba 100644
--- a/include/fdt.h
+++ b/include/fdt.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_FDT_H
diff --git a/include/kmi/assert.h b/include/kmi/assert.h
index aab8ef2..89e809b 100644
--- a/include/kmi/assert.h
+++ b/include/kmi/assert.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ASSERT_H
diff --git a/include/kmi/atomic.h b/include/kmi/atomic.h
index 41c06ad..76d50e4 100644
--- a/include/kmi/atomic.h
+++ b/include/kmi/atomic.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef ATOMIC_H
diff --git a/include/kmi/attrs.h b/include/kmi/attrs.h
index 48e4a07..5c15201 100644
--- a/include/kmi/attrs.h
+++ b/include/kmi/attrs.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_COMPILER_ATTRIBUTES_H
diff --git a/include/kmi/bits.h b/include/kmi/bits.h
index 128ac20..a46f0ec 100644
--- a/include/kmi/bits.h
+++ b/include/kmi/bits.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_BITS_H
diff --git a/include/kmi/builtin.h b/include/kmi/builtin.h
index c509b07..90591c3 100644
--- a/include/kmi/builtin.h
+++ b/include/kmi/builtin.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_BUILTIN_H
diff --git a/include/kmi/canary.h b/include/kmi/canary.h
index a763c74..9e9732c 100644
--- a/include/kmi/canary.h
+++ b/include/kmi/canary.h
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #ifndef KMI_CANARY_H
 #define KMI_CANARY_H
 
diff --git a/include/kmi/caps.h b/include/kmi/caps.h
index 8cc879d..078dd3d 100644
--- a/include/kmi/caps.h
+++ b/include/kmi/caps.h
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #ifndef KMI_CAPS_H
 #define KMI_CAPS_H
 
diff --git a/include/kmi/conf.h b/include/kmi/conf.h
index e4950c9..84b9f06 100644
--- a/include/kmi/conf.h
+++ b/include/kmi/conf.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_CONF_H
diff --git a/include/kmi/debug.h b/include/kmi/debug.h
index e9e9cb8..deca4ca 100644
--- a/include/kmi/debug.h
+++ b/include/kmi/debug.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_DEBUG_H
diff --git a/include/kmi/dmem.h b/include/kmi/dmem.h
index 17348c3..6fd590f 100644
--- a/include/kmi/dmem.h
+++ b/include/kmi/dmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_DEV_H
diff --git a/include/kmi/elf.h b/include/kmi/elf.h
index 21f44f9..feead5e 100644
--- a/include/kmi/elf.h
+++ b/include/kmi/elf.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_ELF_H
diff --git a/include/kmi/initrd.h b/include/kmi/initrd.h
index 9a4e2c0..06bbaac 100644
--- a/include/kmi/initrd.h
+++ b/include/kmi/initrd.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_INITRD_H
diff --git a/include/kmi/ipi.h b/include/kmi/ipi.h
index 065c41f..4567edb 100644
--- a/include/kmi/ipi.h
+++ b/include/kmi/ipi.h
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
 #ifndef KMI_IPI_H
 #define KMI_IPI_H
 
diff --git a/include/kmi/lock.h b/include/kmi/lock.h
index 77c75ce..31cf1aa 100644
--- a/include/kmi/lock.h
+++ b/include/kmi/lock.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_LOCK_H
diff --git a/include/kmi/mem.h b/include/kmi/mem.h
index 3513c04..a6c6bfa 100644
--- a/include/kmi/mem.h
+++ b/include/kmi/mem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_MEM_H
diff --git a/include/kmi/mem_nodes.h b/include/kmi/mem_nodes.h
index f44b6a4..523c087 100644
--- a/include/kmi/mem_nodes.h
+++ b/include/kmi/mem_nodes.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_MM_NODES_H
diff --git a/include/kmi/mem_regions.h b/include/kmi/mem_regions.h
index c9b3ec0..2e880f4 100644
--- a/include/kmi/mem_regions.h
+++ b/include/kmi/mem_regions.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_MEM_REGIONS_H
diff --git a/include/kmi/nodes.h b/include/kmi/nodes.h
index 574f545..dd9a872 100644
--- a/include/kmi/nodes.h
+++ b/include/kmi/nodes.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_NODES_H
diff --git a/include/kmi/pmem.h b/include/kmi/pmem.h
index f69f7b0..5f4b885 100644
--- a/include/kmi/pmem.h
+++ b/include/kmi/pmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_PMEM_H
diff --git a/include/kmi/power.h b/include/kmi/power.h
index 0cfec4b..d11b9d1 100644
--- a/include/kmi/power.h
+++ b/include/kmi/power.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_POWER_H
diff --git a/include/kmi/proc.h b/include/kmi/proc.h
index c69c5b4..c49be78 100644
--- a/include/kmi/proc.h
+++ b/include/kmi/proc.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_PROC_H
diff --git a/include/kmi/sizes.h b/include/kmi/sizes.h
index f56435e..2a58995 100644
--- a/include/kmi/sizes.h
+++ b/include/kmi/sizes.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_SIZES_H
diff --git a/include/kmi/sp_tree.h b/include/kmi/sp_tree.h
index 9a81270..676329a 100644
--- a/include/kmi/sp_tree.h
+++ b/include/kmi/sp_tree.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef SP_TREE_H
diff --git a/include/kmi/string.h b/include/kmi/string.h
index d2ad529..2b26a2d 100644
--- a/include/kmi/string.h
+++ b/include/kmi/string.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_STRING_H
diff --git a/include/kmi/syscalls.h b/include/kmi/syscalls.h
index de59965..bb7891b 100644
--- a/include/kmi/syscalls.h
+++ b/include/kmi/syscalls.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_SYSCALLS_H
diff --git a/include/kmi/tcb.h b/include/kmi/tcb.h
index bb57b44..420c432 100644
--- a/include/kmi/tcb.h
+++ b/include/kmi/tcb.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_TCB_H
diff --git a/include/kmi/timer.h b/include/kmi/timer.h
index 3bc2b3f..c0855e4 100644
--- a/include/kmi/timer.h
+++ b/include/kmi/timer.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_TIMER_H
diff --git a/include/kmi/types.h b/include/kmi/types.h
index c5730a9..5d7225e 100644
--- a/include/kmi/types.h
+++ b/include/kmi/types.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_TYPES_H
diff --git a/include/kmi/uapi.h b/include/kmi/uapi.h
index 9c6c7be..1ec69db 100644
--- a/include/kmi/uapi.h
+++ b/include/kmi/uapi.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_UAPI_H
diff --git a/include/kmi/unaligned.h b/include/kmi/unaligned.h
index 3930b29..fac5146 100644
--- a/include/kmi/unaligned.h
+++ b/include/kmi/unaligned.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_UNALIGNED_H
diff --git a/include/kmi/utils.h b/include/kmi/utils.h
index bd39f6a..10f99d3 100644
--- a/include/kmi/utils.h
+++ b/include/kmi/utils.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_UTILS_H
diff --git a/include/kmi/vmem.h b/include/kmi/vmem.h
index 9fbbffc..63b931b 100644
--- a/include/kmi/vmem.h
+++ b/include/kmi/vmem.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_VMEM_H
diff --git a/include/libfdt.h b/include/libfdt.h
index 3aeaa0f..37247a3 100644
--- a/include/libfdt.h
+++ b/include/libfdt.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef KMI_LIBFDT_H
diff --git a/include/libfdt_env.h b/include/libfdt_env.h
index e4bfd55..6809398 100644
--- a/include/libfdt_env.h
+++ b/include/libfdt_env.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 #ifndef LIBFDT_ENV_H
diff --git a/lib/fdt.c b/lib/fdt.c
index 1f0277c..cc39527 100644
--- a/lib/fdt.c
+++ b/lib/fdt.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_addresses.c b/lib/fdt_addresses.c
index bcf77b1..fb0f512 100644
--- a/lib/fdt_addresses.c
+++ b/lib/fdt_addresses.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_dbg.c b/lib/fdt_dbg.c
index 08e3d2d..d2d4e7b 100644
--- a/lib/fdt_dbg.c
+++ b/lib/fdt_dbg.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_empty_tree.c b/lib/fdt_empty_tree.c
index eb2bc06..105d14e 100644
--- a/lib/fdt_empty_tree.c
+++ b/lib/fdt_empty_tree.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_ro.c b/lib/fdt_ro.c
index 5fff1d9..9ecb1fe 100644
--- a/lib/fdt_ro.c
+++ b/lib/fdt_ro.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_rw.c b/lib/fdt_rw.c
index ad697c7..94607a3 100644
--- a/lib/fdt_rw.c
+++ b/lib/fdt_rw.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_strerror.c b/lib/fdt_strerror.c
index 9e292d9..8b76058 100644
--- a/lib/fdt_strerror.c
+++ b/lib/fdt_strerror.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_sw.c b/lib/fdt_sw.c
index 721a2f6..3f548be 100644
--- a/lib/fdt_sw.c
+++ b/lib/fdt_sw.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/fdt_wip.c b/lib/fdt_wip.c
index 36b0fae..c6b7656 100644
--- a/lib/fdt_wip.c
+++ b/lib/fdt_wip.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/lib/ubsan.c b/lib/ubsan.c
index 4675d06..2b30dc0 100644
--- a/lib/ubsan.c
+++ b/lib/ubsan.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
 /* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
 
 /**
diff --git a/scripts/license b/scripts/license
new file mode 100755
index 0000000..53bd5da
--- /dev/null
+++ b/scripts/license
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+SPDX="/* SPDX-License-Identifier: copyleft-next-0.3.1 */"
+
+for f in "$@"
+do
+	if [ "$(head -1 "$f")" != "${SPDX}" ]
+	then
+		sed -i "1i${SPDX}\n" "$f"
+	fi
+
+	if ! grep 'Copyright' "$f" > /dev/null
+	then
+		echo "Missing copyright info in $f"
+	fi
+done