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From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Mon, 6 Nov 2023 14:19:33 +0100
Message-ID: <CACRpkdaB390mn2s3vrVAhaY9Portxdzc8bVkM5F3DtVy-k-r2Q@mail.gmail.com>
Subject: Re: arch/arm/kernel/hibernate.c:29:40: warning: array subscript -1 is
 outside array bounds of 'const void[2147483647]'
To:     kernel test robot <lkp@intel.com>
Cc:     oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org
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Hi Robot,

On Wed, Oct 18, 2023 at 2:17=E2=80=AFPM kernel test robot <lkp@intel.com> w=
rote:

>    arch/arm/kernel/hibernate.c: In function 'pfn_is_nosave':
> >> arch/arm/kernel/hibernate.c:29:40: warning: array subscript -1 is outs=
ide array bounds of 'const void[2147483647]' [-Warray-bounds=3D]
>       29 |         unsigned long nosave_end_pfn =3D virt_to_pfn(&__nosave=
_end - 1);
>          |                                        ^~~~~~~~~~~~~~~~~~~~~~~=
~~~~~~~

So the concern is that &__nosave_end  could be 0 and the -1 would make
it wrap around?

It still has nothing to do with arrays, I don't get it.

Yours,
Linus Walleij