[urcu.git] / lgpl-relicensing.txt

Mathieu Desnoyers
May 13th, 2009

IBM Corporation allowed LGPLv2.1+ licensing of their contribution to the
userspace RCU library.

ACCESS_ONCE(), likely(), unlikely() and barrier() are considered trivial enough
that copyright does not apply to them. I (Mathieu Desnoyers) re-typed them from
scratch in a mail client just to prove it.

Bert Wesarg <bert.wesarg@googlemail.com> approved LGPL relicensing of his patch.

xchg() primitives has been rewritten from a MIT-licensed cmpxchg for Intel and
powerpc. They are MIT-licensed and therefore usable in LGPL code.

I am therefore permitted to relicense the userspace RCU library as LGPLv2.1.
Commit	Line	Data
b92c90fc MD	1	Mathieu Desnoyers
	2	May 13th, 2009
	3
	4	IBM Corporation allowed LGPLv2.1+ licensing of their contribution to the
	5	userspace RCU library.
	6
	7	ACCESS_ONCE(), likely(), unlikely() and barrier() are considered trivial enough
	8	that copyright does not apply to them. I (Mathieu Desnoyers) re-typed them from
	9	scratch in a mail client just to prove it.
	10
	11	Bert Wesarg <bert.wesarg@googlemail.com> approved LGPL relicensing of his patch.
	12
	13	xchg() primitives has been rewritten from a MIT-licensed cmpxchg for Intel and
	14	powerpc. They are MIT-licensed and therefore usable in LGPL code.
	15
	16	I am therefore permitted to relicense the userspace RCU library as LGPLv2.1.