projects / urcu.git / blame
| Commit | Line | Data |
|---|---|---|
| d001c886 MJ |
1 | <!-- |
| 2 | SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 3 | ||
| 4 | SPDX-License-Identifier: CC-BY-4.0 | |
| 5 | --> | |
| 6 | ||
| 7 | # Userspace-RCU LGPL 2.1+ re-licensing | |
| 8 | ||
| b92c90fc MD |
9 | Mathieu Desnoyers |
| 10 | May 13th, 2009 | |
| 11 | ||
| 12 | IBM Corporation allowed LGPLv2.1+ licensing of their contribution to the | |
| 93896c1d MD |
13 | userspace RCU library in a patch submitted on May 8, 2009 from Paul E. |
| 14 | McKenney and reviewed by Steven L. Bennett: | |
| b92c90fc | 15 | |
| d001c886 | 16 | https://lists.lttng.org/pipermail/lttng-dev/2009-May/012835.html |
| b92c90fc | 17 | |
| 93896c1d MD |
18 | I (Mathieu Desnoyers) re-implemented ACCESS_ONCE(), likely(), unlikely() and |
| 19 | barrier() from scratch without reference to the original code. | |
| b92c90fc | 20 | |
| d001c886 | 21 | commit id : 2dc5fa0f7cfbfb0a64a7a67b39626650e863f16a |
| b92c90fc | 22 | |
| d001c886 | 23 | Bert Wesarg <bert.wesarg@googlemail.com> approved LGPL re-licensing of his |
| 93896c1d MD |
24 | patch in an email dated May 13, 2009 : |
| 25 | ||
| d001c886 | 26 | http://lkml.org/lkml/2009/5/13/16 |
| 93896c1d MD |
27 | |
| 28 | xchg() primitives has been rewritten from a MIT-licensed cmpxchg for Intel | |
| 29 | and powerpc. They are MIT-licensed and therefore usable in LGPL code. | |
| 30 | This cmpxchg code was obtained from the atomic_ops project: | |
| 31 | ||
| d001c886 | 32 | http://www.hpl.hp.com/research/linux/atomic_ops/ |
| 93896c1d MD |
33 | |
| 34 | I (Mathieu Desnoyers) wrote the remainder of the code. | |
| 35 | ||
| 36 | The license for the library files in this project was therefore changed to | |
| 37 | LGPLv2.1 on May 13, 2009, as detailed in LICENSE. |