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Re: Userspace RCU library relicensed to LGPLv2.1

From: Evgeniy Polyakov <zbr at ioremap dot net>
To: Mathieu Desnoyers <compudj at krystal dot dyndns dot org>
Cc: Steve Munroe <sjmunroe at us dot ibm dot com>,Robert Wisniewski <bob at watson dot ibm dot com>,Jonathan Corbet <corbet at lwn dot net>,Dominique Toupin <dominique dot toupin at ericsson dot com>,Jake Edge <jake at lwn dot net>, Jan Blunck <jblunck at suse dot de>,libc-alpha at sources dot redhat dot com, ltt-dev at lists dot casi dot polymtl dot ca,"Paul E. McKenney" <paulmck at linux dot vnet dot ibm dot com>,Steven L Bennett <steven dot bennett at us dot ibm dot com>,tech-board <tech-board at lists dot linux-foundation dot org>,zbrown at tumblerings dot org
Date: Fri, 15 May 2009 00:14:15 +0400
Subject: Re: Userspace RCU library relicensed to LGPLv2.1
References: <20090514130639.GD21241@Krystal> <OF6F482AC4.B4DB2F27-ON862575B6.00528823-862575B6.00540A19@us.ibm.com> <20090514162743.GB27060@Krystal> <20090514164555.GE27060@Krystal> <20090514201103.GA1111@Krystal>

On Thu, May 14, 2009 at 04:11:03PM -0400, Mathieu Desnoyers (compudj@krystal.dyndns.org) wrote:
> > Patches to extend the userspace RCU code-base to include (ideally)
> > MIT-style or LGPLv2.1-compatible xchg() primitives and also
> > arch-specific memory barriers for other architectures are very welcome.
> > See arch_x86.h and arch_atomic_x86.h for the detailed list of required
> > per-architecture primitives. (note that get_cycles is only needed for
> > the test programs, not the library per se)
> 
> Note, however, that if someone sends a patch allowing selecting the gcc
> atomic operations as a compile-time option, I would be inclined to merge
> it, especially if it is proven useful for Linux distributions.

I use attached m4 to select either libatomic, __sync or posix lock
protected 'atomic' types in elliptics network to determine proper
abstraction implemention. It requires a trivial bit of changes for the
liburcu though.

-- 
	Evgeniy Polyakov

Attachment: ac_check_atomic.m4
Description: Text document

References:
- Re: Userspace RCU library relicensed to LGPLv2.1
  - From: Mathieu Desnoyers
- Re: Userspace RCU library relicensed to LGPLv2.1
  - From: Mathieu Desnoyers

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