pm: Implement pm_remove_or_zero_pages()

[akaros.git] / LICENSE

diff --git a/LICENSE b/LICENSE
index a778328..f8e2965 100644 (file)
--- a/LICENSE
+++ b/LICENSE
@@ -1,5 +1,32 @@
-ROS is *NOT* licensed for any form of distribution.  We'll eventually license
-it, once we sort through the mess of contributions.
+License Info
+=========================
+The Akaros repository contains a mix of code from different projects across a
+few top-level directories.  The kernel is in `kern/`, userspace libraries are
+in `user/`, and a variety of tools can be found in `tools/`, including the
+toolchain.
+
+The Akaros kernel is licensed under the GNU General Public License, version 2.
+Our kernel is made up of code from a number of other systems.  Anything written
+for the Akaros kernel is licensed "GPLv2 or later".  However, other code, such
+as from Linux and Plan 9, are licensed GPLv2, without the "or later" clause.
+There is also code from BSD, Xen, JOS, and Plan 9 derivatives.  As a whole, the
+kernel is licensed GPLv2.
+
+Note that the Plan 9 code that is a part of Akaros is also licensed under the
+Lucent Public License.  The University of California, Berkeley, has been
+authorised by Alcatel-Lucent to release all Plan 9 software previously governed
+by the Lucent Public License, Version 1.02 under the GNU General Public
+License, Version 2.  Akaros derives its Plan 9 code from this UCB release.  For
+more information, see LICENSE-PLAN9.
+
+Our user code is likewise from a mix of sources.  All code written for Akaros,
+such as `user/parlib/`, is licensed under the GNU LGPLv2.1 or later.  Plan 9
+libraries, including `user/iplib` and `user/ndblib` are licensed under the
+LGPLv2.1, but without the "or later".  See each library for details.
+
+Likewise, `tools/` is a collection of various code.  All of our contributions
+to existing code bases, such as GCC, glibc, and busybox, are licensed under
+their respective projects' licenses.
 
 
 The old JOS code came with the following: