linux-kernel - Re: [PATCH 3/7] tracing: use generic _

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Date:	Tue, 10 Mar 2009 16:48:34 +0100
From:	Frédéric Weisbecker <fweisbec@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Theodore Tso <tytso@....edu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	"Martin J. Bligh" <mbligh@...igh.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Larry Woodman <lwoodman@...hat.com>,
	Jason Baron <jbaron@...hat.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Jiaying Zhang <jiayingz@...gle.com>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH 3/7] tracing: use generic __stringify

2009/3/10 Peter Zijlstra <peterz@...radead.org>:
> On Tue, 2009-03-10 at 11:56 +0100, Frederic Weisbecker wrote:
>> On Tue, Mar 10, 2009 at 12:57:13AM -0400, Steven Rostedt wrote:
>
>> > This removes the custom made STR(x) macros in the tracer and uses
>> > the generic __stringify macro instead.
>
>> Why not simply use the # ?
>
>> > -#define __STR(x) #x
>> > -#define STR(x) __STR(x)
>
> #include <stdio.h>
>
> #define FOO bar
>
> #define __STR(x) #x
> #define STR(x) __STR(x)
>
> void main(void)
> {
>        printf("%s %s\n", __STR(FOO), STR(FOO));
> }
>
> $ gcc -o str str.c; ./str
> str.c: In function ‘main’:
> str.c:9: warning: return type of ‘main’ is not ‘int’
> FOO bar


Thank you both for the explanation.
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