LICENSES: Add the LGPL-2.1 license
Add the full text of the LGPL 2.1 license to the kernel tree. It was
copied directly from:
https://spdx.org/licenses/LGPL-2.1.html#licenseText
Add the required tags for reference and tooling.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/LICENSES/preferred/LGPL-2.1 b/LICENSES/preferred/LGPL-2.1
new file mode 100644
index 0000000..27bb434
--- /dev/null
+++ b/LICENSES/preferred/LGPL-2.1
@@ -0,0 +1,503 @@
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+ To use this license in source code, put one of the following SPDX
+ tag/value pairs into a comment according to the placement
+ guidelines in the licensing rules documentation.
+ For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+ SPDX-License-Identifier: LGPL-2.1
+ For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+ version' use:
+ SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as
+the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
+Preamble
+
+The licenses for most software are designed to take away your freedom to
+share and change it. By contrast, the GNU General Public Licenses are
+intended to guarantee your freedom to share and change free software--to
+make sure the software is free for all its users.
+
+This license, the Lesser General Public License, applies to some specially
+designated software packages--typically libraries--of the Free Software
+Foundation and other authors who decide to use it. You can use it too, but
+we suggest you first think carefully about whether this license or the
+ordinary General Public License is the better strategy to use in any
+particular case, based on the explanations below.
+
+When we speak of free software, we are referring to freedom of use, not
+price. Our General Public Licenses are designed to make sure that you have
+the freedom to distribute copies of free software (and charge for this
+service if you wish); that you receive source code or can get it if you
+want it; that you can change the software and use pieces of it in new free
+programs; and that you are informed that you can do these things.
+
+To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights. These restrictions translate to certain responsibilities for you if
+you distribute copies of the library or if you modify it.
+
+For example, if you distribute copies of the library, whether gratis or for
+a fee, you must give the recipients all the rights that we gave you. You
+must make sure that they, too, receive or can get the source code. If you
+link other code with the library, you must provide complete object files to
+the recipients, so that they can relink them with the library after making
+changes to the library and recompiling it. And you must show them these
+terms so they know their rights.
+
+We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+To protect each distributor, we want to make it very clear that there is no
+warranty for the free library. Also, if the library is modified by someone
+else and passed on, the recipients should know that what they have is not
+the original version, so that the original author's reputation will not be
+affected by problems that might be introduced by others.
+
+Finally, software patents pose a constant threat to the existence of any
+free program. We wish to make sure that a company cannot effectively
+restrict the users of a free program by obtaining a restrictive license
+from a patent holder. Therefore, we insist that any patent license obtained
+for a version of the library must be consistent with the full freedom of
+use specified in this license.
+
+Most GNU software, including some libraries, is covered by the ordinary GNU
+General Public License. This license, the GNU Lesser General Public
+License, applies to certain designated libraries, and is quite different
+from the ordinary General Public License. We use this license for certain
+libraries in order to permit linking those libraries into non-free
+programs.
+
+When a program is linked with a library, whether statically or using a
+shared library, the combination of the two is legally speaking a combined
+work, a derivative of the original library. The ordinary General Public
+License therefore permits such linking only if the entire combination fits
+its criteria of freedom. The Lesser General Public License permits more lax
+criteria for linking other code with the library.
+
+We call this license the "Lesser" General Public License because it does
+Less to protect the user's freedom than the ordinary General Public
+License. It also provides other free software developers Less of an
+advantage over competing non-free programs. These disadvantages are the
+reason we use the ordinary General Public License for many
+libraries. However, the Lesser license provides advantages in certain
+special circumstances.
+
+For example, on rare occasions, there may be a special need to encourage
+the widest possible use of a certain library, so that it becomes a de-facto
+standard. To achieve this, non-free programs must be allowed to use the
+library. A more frequent case is that a free library does the same job as
+widely used non-free libraries. In this case, there is little to gain by
+limiting the free library to free software only, so we use the Lesser
+General Public License.
+
+In other cases, permission to use a particular library in non-free programs
+enables a greater number of people to use a large body of free
+software. For example, permission to use the GNU C Library in non-free
+programs enables many more people to use the whole GNU operating system, as
+well as its variant, the GNU/Linux operating system.
+
+Although the Lesser General Public License is Less protective of the users'
+freedom, it does ensure that the user of a program that is linked with the
+Library has the freedom and the wherewithal to run that program using a
+modified version of the Library.
+
+The precise terms and conditions for copying, distribution and modification
+follow. Pay close attention to the difference between a "work based on the
+library" and a "work that uses the library". The former contains code
+derived from the library, whereas the latter must be combined with the
+library in order to run.
+
+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+0. This License Agreement applies to any software library or other program
+ which contains a notice placed by the copyright holder or other
+ authorized party saying it may be distributed under the terms of this
+ Lesser General Public License (also called "this License"). Each
+ licensee is addressed as "you".
+
+ A "library" means a collection of software functions and/or data
+ prepared so as to be conveniently linked with application programs
+ (which use some of those functions and data) to form executables.
+
+ The "Library", below, refers to any such software library or work which
+ has been distributed under these terms. A "work based on the Library"
+ means either the Library or any derivative work under copyright law:
+ that is to say, a work containing the Library or a portion of it, either
+ verbatim or with modifications and/or translated straightforwardly into
+ another language. (Hereinafter, translation is included without
+ limitation in the term "modification".)
+
+ "Source code" for a work means the preferred form of the work for making
+ modifications to it. For a library, complete source code means all the
+ source code for all modules it contains, plus any associated interface
+ definition files, plus the scripts used to control compilation and
+ installation of the library.
+
+ Activities other than copying, distribution and modification are not
+ covered by this License; they are outside its scope. The act of running
+ a program using the Library is not restricted, and output from such a
+ program is covered only if its contents constitute a work based on the
+ Library (independent of the use of the Library in a tool for writing
+ it). Whether that is true depends on what the Library does and what the
+ program that uses the Library does.
+
+1. You may copy and distribute verbatim copies of the Library's complete
+ source code as you receive it, in any medium, provided that you
+ conspicuously and appropriately publish on each copy an appropriate
+ copyright notice and disclaimer of warranty; keep intact all the notices
+ that refer to this License and to the absence of any warranty; and
+ distribute a copy of this License along with the Library.
+
+ You may charge a fee for the physical act of transferring a copy, and
+ you may at your option offer warranty protection in exchange for a fee.
+
+2. You may modify your copy or copies of the Library or any portion of it,
+ thus forming a work based on the Library, and copy and distribute such
+ modifications or work under the terms of Section 1 above, provided that
+ you also meet all of these conditions:
+
+ a) The modified work must itself be a software library.
+
+ b) You must cause the files modified to carry prominent notices stating
+ that you changed the files and the date of any change.
+
+ c) You must cause the whole of the work to be licensed at no charge to
+ all third parties under the terms of this License.
+
+ d) If a facility in the modified Library refers to a function or a table
+ of data to be supplied by an application program that uses the
+ facility, other than as an argument passed when the facility is
+ invoked, then you must make a good faith effort to ensure that, in
+ the event an application does not supply such function or table, the
+ facility still operates, and performs whatever part of its purpose
+ remains meaningful.
+
+ (For example, a function in a library to compute square roots has a
+ purpose that is entirely well-defined independent of the
+ application. Therefore, Subsection 2d requires that any
+ application-supplied function or table used by this function must be
+ optional: if the application does not supply it, the square root
+ function must still compute square roots.)
+
+ These requirements apply to the modified work as a whole. If
+ identifiable sections of that work are not derived from the Library, and
+ can be reasonably considered independent and separate works in
+ themselves, then this License, and its terms, do not apply to those
+ sections when you distribute them as separate works. But when you
+ distribute the same sections as part of a whole which is a work based on
+ the Library, the distribution of the whole must be on the terms of this
+ License, whose permissions for other licensees extend to the entire
+ whole, and thus to each and every part regardless of who wrote it.
+
+ Thus, it is not the intent of this section to claim rights or contest
+ your rights to work written entirely by you; rather, the intent is to
+ exercise the right to control the distribution of derivative or
+ collective works based on the Library.
+
+ In addition, mere aggregation of another work not based on the Library
+ with the Library (or with a work based on the Library) on a volume of a
+ storage or distribution medium does not bring the other work under the
+ scope of this License.
+
+3. You may opt to apply the terms of the ordinary GNU General Public
+ License instead of this License to a given copy of the Library. To do
+ this, you must alter all the notices that refer to this License, so that
+ they refer to the ordinary GNU General Public License, version 2,
+ instead of to this License. (If a newer version than version 2 of the
+ ordinary GNU General Public License has appeared, then you can specify
+ that version instead if you wish.) Do not make any other change in these
+ notices.
+
+ Once this change is made in a given copy, it is irreversible for that
+ copy, so the ordinary GNU General Public License applies to all
+ subsequent copies and derivative works made from that copy.
+
+ This option is useful when you wish to copy part of the code of the
+ Library into a program that is not a library.
+
+4. You may copy and distribute the Library (or a portion or derivative of
+ it, under Section 2) in object code or executable form under the terms
+ of Sections 1 and 2 above provided that you accompany it with the
+ complete corresponding machine-readable source code, which must be
+ distributed under the terms of Sections 1 and 2 above on a medium
+ customarily used for software interchange.
+
+ If distribution of object code is made by offering access to copy from a
+ designated place, then offering equivalent access to copy the source
+ code from the same place satisfies the requirement to distribute the
+ source code, even though third parties are not compelled to copy the
+ source along with the object code.
+
+5. A program that contains no derivative of any portion of the Library, but
+ is designed to work with the Library by being compiled or linked with
+ it, is called a "work that uses the Library". Such a work, in isolation,
+ is not a derivative work of the Library, and therefore falls outside the
+ scope of this License.
+
+ However, linking a "work that uses the Library" with the Library creates
+ an executable that is a derivative of the Library (because it contains
+ portions of the Library), rather than a "work that uses the
+ library". The executable is therefore covered by this License. Section 6
+ states terms for distribution of such executables.
+
+ When a "work that uses the Library" uses material from a header file
+ that is part of the Library, the object code for the work may be a
+ derivative work of the Library even though the source code is
+ not. Whether this is true is especially significant if the work can be
+ linked without the Library, or if the work is itself a library. The
+ threshold for this to be true is not precisely defined by law.
+
+ If such an object file uses only numerical parameters, data structure
+ layouts and accessors, and small macros and small inline functions (ten
+ lines or less in length), then the use of the object file is
+ unrestricted, regardless of whether it is legally a derivative
+ work. (Executables containing this object code plus portions of the
+ Library will still fall under Section 6.)
+
+ Otherwise, if the work is a derivative of the Library, you may
+ distribute the object code for the work under the terms of Section
+ 6. Any executables containing that work also fall under Section 6,
+ whether or not they are linked directly with the Library itself.
+
+6. As an exception to the Sections above, you may also combine or link a
+ "work that uses the Library" with the Library to produce a work
+ containing portions of the Library, and distribute that work under terms
+ of your choice, provided that the terms permit modification of the work
+ for the customer's own use and reverse engineering for debugging such
+ modifications.
+
+ You must give prominent notice with each copy of the work that the
+ Library is used in it and that the Library and its use are covered by
+ this License. You must supply a copy of this License. If the work during
+ execution displays copyright notices, you must include the copyright
+ notice for the Library among them, as well as a reference directing the
+ user to the copy of this License. Also, you must do one of these things:
+
+ a) Accompany the work with the complete corresponding machine-readable
+ source code for the Library including whatever changes were used in
+ the work (which must be distributed under Sections 1 and 2 above);
+ and, if the work is an executable linked with the Library, with the
+ complete machine-readable "work that uses the Library", as object
+ code and/or source code, so that the user can modify the Library and
+ then relink to produce a modified executable containing the modified
+ Library. (It is understood that the user who changes the contents of
+ definitions files in the Library will not necessarily be able to
+ recompile the application to use the modified definitions.)
+
+ b) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (1) uses at run time a copy
+ of the library already present on the user's computer system, rather
+ than copying library functions into the executable, and (2) will
+ operate properly with a modified version of the library, if the user
+ installs one, as long as the modified version is interface-compatible
+ with the version that the work was made with.
+
+ c) Accompany the work with a written offer, valid for at least three
+ years, to give the same user the materials specified in Subsection
+ 6a, above, for a charge no more than the cost of performing this
+ distribution.
+
+ d) If distribution of the work is made by offering access to copy from a
+ designated place, offer equivalent access to copy the above specified
+ materials from the same place.
+
+ e) Verify that the user has already received a copy of these materials
+ or that you have already sent this user a copy.
+
+ For an executable, the required form of the "work that uses the Library"
+ must include any data and utility programs needed for reproducing the
+ executable from it. However, as a special exception, the materials to be
+ distributed need not include anything that is normally distributed (in
+ either source or binary form) with the major components (compiler,
+ kernel, and so on) of the operating system on which the executable runs,
+ unless that component itself accompanies the executable.
+
+ It may happen that this requirement contradicts the license restrictions
+ of other proprietary libraries that do not normally accompany the
+ operating system. Such a contradiction means you cannot use both them
+ and the Library together in an executable that you distribute.
+
+7. You may place library facilities that are a work based on the Library
+ side-by-side in a single library together with other library facilities
+ not covered by this License, and distribute such a combined library,
+ provided that the separate distribution of the work based on the Library
+ and of the other library facilities is otherwise permitted, and provided
+ that you do these two things:
+
+ a) Accompany the combined library with a copy of the same work based on
+ the Library, uncombined with any other library facilities. This must
+ be distributed under the terms of the Sections above.
+
+ b) Give prominent notice with the combined library of the fact that part
+ of it is a work based on the Library, and explaining where to find
+ the accompanying uncombined form of the same work.
+
+8. You may not copy, modify, sublicense, link with, or distribute the
+ Library except as expressly provided under this License. Any attempt
+ otherwise to copy, modify, sublicense, link with, or distribute the
+ Library is void, and will automatically terminate your rights under this
+ License. However, parties who have received copies, or rights, from you
+ under this License will not have their licenses terminated so long as
+ such parties remain in full compliance.
+
+9. You are not required to accept this License, since you have not signed
+ it. However, nothing else grants you permission to modify or distribute
+ the Library or its derivative works. These actions are prohibited by law
+ if you do not accept this License. Therefore, by modifying or
+ distributing the Library (or any work based on the Library), you
+ indicate your acceptance of this License to do so, and all its terms and
+ conditions for copying, distributing or modifying the Library or works
+ based on it.
+
+10. Each time you redistribute the Library (or any work based on the
+ Library), the recipient automatically receives a license from the
+ original licensor to copy, distribute, link with or modify the Library
+ subject to these terms and conditions. You may not impose any further
+ restrictions on the recipients' exercise of the rights granted
+ herein. You are not responsible for enforcing compliance by third
+ parties with this License.
+
+11. If, as a consequence of a court judgment or allegation of patent
+ infringement or for any other reason (not limited to patent issues),
+ conditions are imposed on you (whether by court order, agreement or
+ otherwise) that contradict the conditions of this License, they do not
+ excuse you from the conditions of this License. If you cannot
+ distribute so as to satisfy simultaneously your obligations under this
+ License and any other pertinent obligations, then as a consequence you
+ may not distribute the Library at all. For example, if a patent license
+ would not permit royalty-free redistribution of the Library by all
+ those who receive copies directly or indirectly through you, then the
+ only way you could satisfy both it and this License would be to refrain
+ entirely from distribution of the Library.
+
+ If any portion of this section is held invalid or unenforceable under
+ any particular circumstance, the balance of the section is intended to
+ apply, and the section as a whole is intended to apply in other
+ circumstances.
+
+ It is not the purpose of this section to induce you to infringe any
+ patents or other property right claims or to contest validity of any
+ such claims; this section has the sole purpose of protecting the
+ integrity of the free software distribution system which is implemented
+ by public license practices. Many people have made generous
+ contributions to the wide range of software distributed through that
+ system in reliance on consistent application of that system; it is up
+ to the author/donor to decide if he or she is willing to distribute
+ software through any other system and a licensee cannot impose that
+ choice.
+
+ This section is intended to make thoroughly clear what is believed to
+ be a consequence of the rest of this License.
+
+12. If the distribution and/or use of the Library is restricted in certain
+ countries either by patents or by copyrighted interfaces, the original
+ copyright holder who places the Library under this License may add an
+ explicit geographical distribution limitation excluding those
+ countries, so that distribution is permitted only in or among countries
+ not thus excluded. In such case, this License incorporates the
+ limitation as if written in the body of this License.
+
+13. The Free Software Foundation may publish revised and/or new versions of
+ the Lesser General Public License from time to time. Such new versions
+ will be similar in spirit to the present version, but may differ in
+ detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the Library
+ specifies a version number of this License which applies to it and "any
+ later version", you have the option of following the terms and
+ conditions either of that version or of any later version published by
+ the Free Software Foundation. If the Library does not specify a license
+ version number, you may choose any version ever published by the Free
+ Software Foundation.
+
+14. If you wish to incorporate parts of the Library into other free
+ programs whose distribution conditions are incompatible with these,
+ write to the author to ask for permission. For software which is
+ copyrighted by the Free Software Foundation, write to the Free Software
+ Foundation; we sometimes make exceptions for this. Our decision will be
+ guided by the two goals of preserving the free status of all
+ derivatives of our free software and of promoting the sharing and reuse
+ of software generally.
+
+NO WARRANTY
+
+15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+ FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+ OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+ PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
+ EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
+ ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE LIBRARY IS WITH
+ YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
+ NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+ WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+ REDISTRIBUTE THE LIBRARY 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 LIBRARY
+ (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 LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR
+ OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Libraries
+
+If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+To apply these terms, attach the following notices to the library. It is
+safest to attach them to the start of each source file to most effectively
+convey 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 library's name and an idea of what it does.
+Copyright (C) year name of author
+
+This library is free software; you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at
+your option) any later version.
+
+This library 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 Lesser General Public License
+for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Also add
+information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+Yoyodyne, Inc., hereby disclaims all copyright interest in
+the library `Frob' (a library for tweaking knobs) written
+by James Random Hacker.
+
+signature of Ty Coon, 1 April 1990
+Ty Coon, President of Vice
+That's all there is to it!