linux-kernel - Re: [PATCH 02/17] kallsyms: increase maximum kernel symbol length to 512

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Message-ID: <CAHk-=wjWiu5uak824BeWu5J+9n1NhQ9UKDGgcUfrumra6r+Z0A@mail.gmail.com>
Date:   Wed, 14 Jul 2021 15:40:12 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        rust-for-linux <rust-for-linux@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Geoffrey Thomas <geofft@...reload.com>,
        Finn Behrens <me@...enk.de>,
        Adam Bratschi-Kaye <ark.email@...il.com>,
        Wedson Almeida Filho <wedsonaf@...gle.com>
Subject: Re: [PATCH 02/17] kallsyms: increase maximum kernel symbol length to 512

On Wed, Jul 14, 2021 at 1:49 PM Eric W. Biederman <ebiederm@...ssion.com> wrote:
>
> Sorry I was meaning to ask should the C symbols that get hashed
> include their types in the hash as well?  Because if everything
> is going to be hashed we need to clear definition of what we do
> with good old C symbols as well.

Oh, I guess if we wanted to be fancy, we could make the modversion
information be part of the hash.

Because we already have that, and that's kind of what it is. But I
wasn't actually thinking that fancy - I'd leave the C hash as just the
name hash with no type info.

Unless somebody really wants to do that modversions thing. It *would*
be a very natural thing to do in that "link using hashes" world view..

                Linus