linux-kernel - Re: [PATCH 1/9] trace: Fix uninitialized variable compiler warning

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Date:	Mon, 28 Nov 2011 14:34:42 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	fweisbec@...il.com, mingo@...hat.com, paulus@...ba.org,
	acme@...stprotocols.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/9] trace: Fix uninitialized variable compiler warning

On Mon, 2011-11-28 at 17:25 +0100, Jiri Olsa wrote:
> 
> On Mon, Nov 28, 2011 at 11:19:18AM -0500, Steven Rostedt wrote:
> > On Sun, 2011-11-27 at 19:04 +0100, Jiri Olsa wrote:
> > > Initialize page2 variable to make compiler happy.
> > 
> > What compiler is this? Because this is a compiler bug. In fact, there's
> > no check for page2 being NULL, so if it is used uninitialized it will
> > crash the kernel. I don't like these "make the compiler shut up" fixes,
> > because honestly, changes like this hide bugs.
> 
> [jolsa@...va1 ~]$ gcc --version
> gcc (GCC) 4.4.5 20110214 (Red Hat 4.4.5-6)

Yep, that's an old compiler. The newer ones don't show this as an error.

-- Steve


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