linux-kernel - Re: [PATCH] genksyms: Teach parser about 128-bit built-in types

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Message-ID: <CAK8P3a3phkiL8LFQM_AewMCE0EpQaCTOmgkVJe4x9oV84F4_7g@mail.gmail.com>
Date:   Tue, 18 Jun 2019 16:17:35 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Will Deacon <will.deacon@....com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Dave Martin <dave.martin@....com>,
        Richard Henderson <rth@...ddle.net>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH] genksyms: Teach parser about 128-bit built-in types

On Tue, Jun 18, 2019 at 3:10 PM Will Deacon <will.deacon@....com> wrote:
>
> +       { "__int128", BUILTIN_INT_KEYW },
> +       { "__int128_t", BUILTIN_INT_KEYW },
> +       { "__uint128_t", BUILTIN_INT_KEYW },

I wonder if it's safe to treat them as the same type, since
__int128_t and __uint128_t differ in signedness.

If someone exports a symbol with one and changes it to the other, they
would appear to be the same type.

        Arnd