linux-kernel - Re: [PATCH] kvm: Fix build warnings

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Date:	Tue, 7 Jun 2011 09:28:13 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, kvm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
Subject: Re: [PATCH] kvm: Fix build warnings

On Tue, May 31, 2011 at 12:26:55PM +0200, Ingo Molnar wrote:
> 
> * Avi Kivity <avi@...hat.com> wrote:
> 
> > On 05/31/2011 10:38 AM, Ingo Molnar wrote:
> > >* Borislav Petkov<bp@...en8.de>  wrote:
> > >
> > >>  +++ b/arch/x86/kvm/paging_tmpl.h
> > >>  @@ -121,7 +121,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
> > >>   				gva_t addr, u32 access)
> > >>   {
> > >>   	pt_element_t pte;
> > >>  -	pt_element_t __user *ptep_user;
> > >>  +	pt_element_t __user *uninitialized_var(ptep_user);
> > >
> > >Note that doing this is actually actively dangerous for two reasons.
> > >
> > >
> > 
> > <snip lots of good advice>
> > 
> > > Please fix it instead.
> > 
> > s/instead/in addition/; while all those changes are good, they are 
> > much too large for 3.0.  Let's push the simple fix for 3.0 and 
> > queue the bigger refactoring to 3.1.
> 
> Yeah, that's probably wise, this is a tricky function.

So, any progress on this front? Warning is still there in -rc2.

Thanks.

-- 
Regards/Gruss,
    Boris.
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