linux-kernel - Re: [PATCH 2/2] jump label: introduce static

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Date:	Sun, 9 Jan 2011 13:48:03 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Jason Baron <jbaron@...hat.com>
Cc:	peterz@...radead.org, hpa@...or.com, rostedt@...dmis.org,
	mingo@...e.hu, tglx@...utronix.de, andi@...stfloor.org,
	roland@...hat.com, rth@...hat.com, masami.hiramatsu.pt@...achi.com,
	fweisbec@...il.com, avi@...hat.com, davem@...emloft.net,
	sam@...nborg.org, ddaney@...iumnetworks.com,
	michael@...erman.id.au, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] jump label: introduce static_branch()

* Jason Baron (jbaron@...hat.com) wrote:
> Introduce:
> 
> static __always_inline bool static_branch(struct jump_label_key *key)
> 
> to replace the old JUMP_LABEL(key, label) macro.
> 
> The new static_branch(), simplifies the usage of jump labels. Since,
> static_branch() returns a boolean, it can be used as part of an if()
> construct. It also, allows us to drop the 'label' argument from the
> prototype. Its probably best understood with an example, here is the part
> of the patch that converts the tracepoints to use unlikely_switch():

small nit:

  s/unlikely_switch/arch_static_branch/g

Thanks,

Mathieu

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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