IBM Corporation allowed LGPLv2.1+ licensing of their contribution to the userspace RCU
library in a patch submitted on May 8, 2009 from Paul E. McKenney and reviewed by
Steven L. Bennett:
http://lists.casi.polymtl.ca/pipermail/ltt-dev/2009-May/001584.html
I (Mathieu Desnoyers) re-implemented ACCESS_ONCE(), likely(), unlikely() and barrier()
from scratch without reference to the original code.
commit id : 2dc5fa0f7cfbfb0a64a7a67b39626650e863f16a
Bert Wesarg <bert.wesarg@googlemail.com> approved LGPL relicensing of his patch in an
email dated May 13, 2009 :
http://lkml.org/lkml/2009/5/13/16
xchg() primitives has been rewritten from a MIT-licensed cmpxchg for Intel and powerpc.
They are MIT-licensed and therefore usable in LGPL code.
This cmpxchg code was obtained from the atomic_ops project:
http://www.hpl.hp.com/research/linux/atomic_ops/
I (Mathieu Desnoyers) wrote the remainder of the code.
The license for the library files in this project was therefore changed to
LGPLv2.1 on May 13, 2009, as detailed in LICENSE.
ETERNUS CS800 555
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