linux-kernel - Re: [PATCH] Trace: initialize variable to clear warning

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Date:	Wed, 29 Feb 2012 17:40:30 -0500
From:	Valdis.Kletnieks@...edu
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Zhengwang Ruan <ruan.zhengwang@...il.com>, fweisbec@...il.com,
	mingo@...hat.com, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] Trace: initialize variable to clear warning

On Tue, 28 Feb 2012 09:16:31 EST, Steven Rostedt said:

> This is a bug in gcc that's fixed in 4.6 and beyond. I don't want to
> remove this warning because it will hide a real bug if page2 really does
> become uninitialized. If 4.6 gives a warning here, then I'll fix it.

> > -	void *page2;
> > +	void *uninitialized_var(page2);

How would you feel about this?

-	void *page2;
+	void *page2; /* gcc 4.5 bug causes incorrect "uninitialized" warning */

or something similar?


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