linux-kernel - Re: Porting "jump labels" to userspace

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Message-ID: <4D5C3024.6040807@caviumnetworks.com>
Date:	Wed, 16 Feb 2011 12:14:28 -0800
From:	David Daney <ddaney@...iumnetworks.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC:	Roland McGrath <roland@...hat.com>, Mark Wielaard <mjw@...hat.com>,
	Stefan Hajnoczi <stefanha@...il.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Julien Desfossez <julien.desfossez@...ymtl.ca>,
	dominique.toupin@...csson.com, ltt-dev@...ts.casi.polymtl.ca,
	systemtap@...rces.redhat.com, linux-kernel@...r.kernel.org,
	Jason Baron <jbaron@...hat.com>, hpa@...or.com,
	rostedt@...dmis.org, mingo@...e.hu, tglx@...utronix.de,
	andi@...stfloor.org, rth@...hat.com,
	masami.hiramatsu.pt@...achi.com, fweisbec@...il.com,
	avi@...hat.com, davem@...emloft.net, sam@...nborg.org,
	michael@...erman.id.au, Peter Zijlstra <peterz@...radead.org>
Subject: Re: Porting "jump labels" to userspace

On 02/16/2011 12:00 PM, Mathieu Desnoyers wrote:
[...]>
> Actually, creating the equivalent of the jump labels for userspace is on our
> list of "things to do" for the UST project.
>
> If Jason and other jump label contributors agree to dual-license the jump label
> generic and per-arch implementations under both GPLv2 and LGPLv2.1, we could
> probably re-use a large part of this code to create a static jump label library
> for userspace. The concerned authors are precisely: Jason for generic and x86
> code, Steven for some improvements in generic code and David S. Miller for the
> sparc port. After things settle down with the current jump label changes
> proposed by Peter Zijlstra, we might also want to ask for his permission to
> LGPLize his changes.
>
FWIW:  MIPS jump label support is now in as of:

94bb0c1 (MIPS: jump label: Add MIPS support.)

I would be the author of that.

David Daney
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