linux-kernel - Re: [PATCH 03/10] jump label v11: base patch

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Message-Id: <20100917.112119.141239689.davem@davemloft.net>
Date:	Fri, 17 Sep 2010 11:21:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jbaron@...hat.com
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu,
	mathieu.desnoyers@...ymtl.ca, hpa@...or.com, tglx@...utronix.de,
	rostedt@...dmis.org, andi@...stfloor.org, roland@...hat.com,
	rth@...hat.com, mhiramat@...hat.com, fweisbec@...il.com,
	avi@...hat.com, vgoyal@...hat.com, sam@...nborg.org,
	tony@...eyournoodle.com
Subject: Re: [PATCH 03/10] jump label v11: base patch

From: Jason Baron <jbaron@...hat.com>
Date: Fri, 17 Sep 2010 11:09:00 -0400

> base patch to implement 'jump labeling'. Based on a new 'asm goto' inline
> assembly gcc mechanism, we can now branch to labels from an 'asm goto'
> statment. This allows us to create a 'no-op' fastpath, which can subsequently
> be patched with a jump to the slowpath code. This is useful for code which
> might be rarely used, but which we'd like to be able to call, if needed.
> Tracepoints are the current usecase that these are being implemented for.
> 
> Signed-off-by: Jason Baron <jbaron@...hat.com>

Acked-by: David S. Miller <davem@...emloft.net>
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