linux-kernel - Re: [PATCH 10/13] jump label v9: convert jump label to use a key

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Message-ID: <1276173826.2077.252.camel@twins>
Date:	Thu, 10 Jun 2010 14:43:46 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jason Baron <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, davem@...emloft.net, vgoyal@...hat.com,
	sam@...nborg.org
Subject: Re: [PATCH 10/13] jump label v9: convert jump label to use a key

On Wed, 2010-06-09 at 17:39 -0400, Jason Baron wrote:
> -static inline int enable_jump_label(const char *name)
> -{
> -       return 0;
> -}
> -
> -static inline int disable_jump_label(const char *name)
> -{
> -       return 0;
> -}
> +#define enable_jump_label(key)
> +#define disable_jump_label(key) 

I would expect enable_jump_label() to look something like:

#define enable_jump_label(cond_var)	\
do {					\
	*(cond_var) = 1;		\
} while (0)

That way the HAVE_JUMP_LABEL and !HAVE_JUMP_LABEL code has similar
effects.
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