linux-kernel - Re: [PATCH 02/13] jump label v9: base patch

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Message-ID: <1276172338.2077.211.camel@twins>
Date:	Thu, 10 Jun 2010 14:18:58 +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 02/13] jump label v9: base patch

On Wed, 2010-06-09 at 17:38 -0400, Jason Baron wrote:

> +#define DEFINE_JUMP_LABEL(name)						\
> +	const char __jlstrtab_##name[]					\
> +	__used __attribute__((section("__jump_strings")))  = #name;

> +#define JUMP_LABEL(tag, label, cond)		\
> +do {						\
> +	if (unlikely(cond))			\
> +		goto label;			\
> +} while (0)

> +#define JUMP_LABEL(tag, label, cond)                           \
> +       do {                                                    \
> +               extern const char __jlstrtab_##tag[];           \
> +               asm goto("1:"                                   \
> +                       JUMP_LABEL_NOP                          \
> +                       ".pushsection __jump_table,  \"a\" \n\t"\
> +                       _ASM_PTR "1b, %l[" #label "], %c0 \n\t" \
> +                       ".popsection \n\t"                      \
> +                       : :  "i" (__jlstrtab_##tag) :  : label);\
> +       } while (0)


s/tag/name/ ?
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