linux-kernel - Re: [PATCH 3/3] kallsyms: fix type of kallsyms_token

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Date:   Mon, 3 Feb 2020 14:19:07 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Justin Capella <justincapella@...il.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marc Zyngier <maz@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] kallsyms: fix type of kallsyms_token_table[]

On Mon, Feb 3, 2020 at 12:26 PM Justin Capella <justincapella@...il.com> wrote:
>
> unsigned char maybe? I understand printable chars unlikely to cause
> any trouble and probably a non issue, but the domain is different for
> char, and while I don't know of supported implementations where sizeof
> char isn't a byte, I think it's a possibility and perhaps why u8 was
> in use?


As I said in the commit description,
this only contains ASCII, which is 7-bit code.

We do not care the signed-ness of char.


kallsyms_names[] has been u8 since the
following old commit:


commit e10392112d315c45f054c22c862e3a7ae27d17d4
Author: Paulo Marques <pmarques@...popie.com>
Date:   Mon Oct 18 17:59:03 2004 -0700

    [PATCH] kallsyms data size reduction / lookup speedup



Probably, this is just coding mistake.



-- 
Best Regards
Masahiro Yamada