linux-kernel - Re: linux-next: build warning after merge of the tip tree

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Message-ID: <20200401085753.617c1636@canb.auug.org.au>
Date:   Wed, 1 Apr 2020 08:57:53 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: linux-next: build warning after merge of the tip tree

Hi all,

On Mon, 30 Mar 2020 13:47:46 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
> 
> After merging the tip tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
> 
> kernel/futex.c: In function 'do_futex':
> kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized]
>  1676 |   return oldval == cmparg;
>       |          ~~~~~~~^~~~~~~~~
> kernel/futex.c:1652:6: note: 'oldval' was declared here
>  1652 |  int oldval, ret;
>       |      ^~~~~~
> 
> Introduced by commit
> 
>   a08971e9488d ("futex: arch_futex_atomic_op_inuser() calling conventions change")
> 
> but I don't see how it makes this difference :-(

I now get this warning from building Linus' tree :-(

-- 
Cheers,
Stephen Rothwell

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