linux-kernel - Re: [PATCH] x86, vsyscall: Fix build warning in vsyscall

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Date:	Mon, 13 Jun 2011 11:29:40 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Lutomirski <luto@....edu>
Cc:	Rakib Mullick <rakib.mullick@...il.com>, hpa@...or.com,
	tglx@...utronix.de, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86, vsyscall: Fix build warning in vsyscall_64.c


* Andrew Lutomirski <luto@....edu> wrote:

> On Sat, Jun 11, 2011 at 3:31 AM, Rakib Mullick <rakib.mullick@...il.com> wrote:
> > Due to commit 5cec93c216db77 (x86-64: Emulate legacy vsyscalls), we get the following warning:
> >
> >   arch/x86/kernel/vsyscall_64.c: In function ‘do_emulate_vsyscall’:
> >   arch/x86/kernel/vsyscall_64.c:111:7: warning: ‘ret’ may be used uninitialized in this function
> 
> What's the code path that uses ret without initializing it?

If the code is correct but GCC got confused then please use the 
simplest possible patch to help GCC find its way around the code.

Thanks,

	Ingo
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