linux-kernel - Re: [PATCH linux-next] lib: Dhrystone: initialize ret value

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Message-ID: <CAABZP2xojYo+gtvFz9MtfPp4xJ=iha-tuRR3x-TRkKUqTYDUjg@mail.gmail.com>
Date:   Sat, 24 Dec 2022 14:19:42 +0800
From:   Zhouyi Zhou <zhouzhouyi@...il.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     ndesaulniers@...gle.com, trix@...hat.com,
        akpm@...ux-foundation.org, geert+renesas@...der.be,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH linux-next] lib: Dhrystone: initialize ret value

On Sat, Dec 24, 2022 at 1:58 PM Nathan Chancellor <nathan@...nel.org> wrote:
>
> On Sat, Dec 24, 2022 at 01:06:40PM +0800, Zhouyi Zhou wrote:
> > Initialize ret value whenever 'if' condition is false in dhry_run_set.
> >
> > Signed-off-by: Zhouyi Zhou <zhouzhouyi@...il.com>
> > ---
> > Dear Developers:
> > When I invoke make bzImage LLVM=1, clang complains followings:
> > lib/dhry_run.c:61:6: error: variable 'ret' is used uninitialized whenever 'if' condition is false
> >
> > Fix above complain by initialize the ret value.
> >
> > Thanks
> > Zhouyi
>
> Thank you for the patch! I think this has already been fixed:
>
> https://lore.kernel.org/20221219221045.0ABAEC433D2@smtp.kernel.org/
Thank you for reviewing my patch ;-), I see
>
> -next is on a break so it won't be there for a bit:
>
> https://lore.kernel.org/20221220112148.64f183ce@canb.auug.org.au/
Thank you for your guidance, I think I should stop working on -next
for awhile ;-)
>
> Cheers,
> Nathan
Cheers
Zhouyi
>
> > --
> >  lib/dhry_run.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/lib/dhry_run.c b/lib/dhry_run.c
> > index 31a1d442e4a0..be86e5126c29 100644
> > --- a/lib/dhry_run.c
> > +++ b/lib/dhry_run.c
> > @@ -64,6 +64,7 @@ static int dhry_run_set(const char *val, const struct kernel_param *kp)
> >                       return ret;
> >       } else {
> >               dhry_run = true;
> > +             ret = 0;
> >       }
> >
> >       if (dhry_run && system_state == SYSTEM_RUNNING)
> > --
> > 2.34.1
> >