[urcu.git] / lgpl-relicensing.txt

Mathieu Desnoyers
May 13th, 2009

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.
Commit	Line	Data
	1	Mathieu Desnoyers
	2	May 13th, 2009
	3
	4	IBM Corporation allowed LGPLv2.1+ licensing of their contribution to the
	5	userspace RCU library in a patch submitted on May 8, 2009 from Paul E.
	6	McKenney and reviewed by Steven L. Bennett:
	7
	8	http://lists.casi.polymtl.ca/pipermail/ltt-dev/2009-May/001584.html
	9
	10	I (Mathieu Desnoyers) re-implemented ACCESS_ONCE(), likely(), unlikely() and
	11	barrier() from scratch without reference to the original code.
	12
	13	commit id : 2dc5fa0f7cfbfb0a64a7a67b39626650e863f16a
	14
	15	Bert Wesarg <bert.wesarg@googlemail.com> approved LGPL relicensing of his
	16	patch in an email dated May 13, 2009 :
	17
	18	http://lkml.org/lkml/2009/5/13/16
	19
	20	xchg() primitives has been rewritten from a MIT-licensed cmpxchg for Intel
	21	and powerpc. They are MIT-licensed and therefore usable in LGPL code.
	22	This cmpxchg code was obtained from the atomic_ops project:
	23
	24	http://www.hpl.hp.com/research/linux/atomic_ops/
	25
	26	I (Mathieu Desnoyers) wrote the remainder of the code.
	27
	28	The license for the library files in this project was therefore changed to
	29	LGPLv2.1 on May 13, 2009, as detailed in LICENSE.