linux-kernel - Re: [PATCH] TRACING: Fix a copmile warning

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Date:	Mon, 25 Jul 2011 16:19:57 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Arnaud Lacombe <lacombar@...il.com>
Cc:	stufever@...il.com, linux-kernel@...r.kernel.org,
	Wang Shaoyan <wangshaoyan.pt@...bao.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH] TRACING: Fix a copmile warning

On Mon, 2011-07-25 at 15:43 -0400, Arnaud Lacombe wrote:

> Actually, we have a special uninitialized_var(x) macro to handle such
> false positive. From include/linux/compiler-gcc.h:
> 
> /*
>  * A trick to suppress uninitialized variable warning without generating any
>  * code
>  */
> #define uninitialized_var(x) x = x

I'm aware of that too, but I think that is inappropriate as well. As I
said, some versions of gcc report it, others don't. Seems that gcc 4.6.0
says this is an error where 4.5.1 does not (I just tried both). Looks to
me like a regression in gcc. Why not fix it there?

-- Steve


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