linux-kernel - Re: [PATCH 1/2] kallsyms: get rid of code for absolute kallsyms

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Message-Id: <e33a59f7-cf0e-4b63-b994-752d1e77652a@app.fastmail.com>
Date: Wed, 21 Feb 2024 22:18:47 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Jann Horn" <jannh@...gle.com>,
 "Andrew Morton" <akpm@...ux-foundation.org>
Cc: "Masahiro Yamada" <masahiroy@...nel.org>,
 "Nick Desaulniers" <ndesaulniers@...gle.com>,
 "Miguel Ojeda" <ojeda@...nel.org>, "Zhen Lei" <thunder.leizhen@...wei.com>,
 linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
 "Ard Biesheuvel" <ardb@...nel.org>
Subject: Re: [PATCH 1/2] kallsyms: get rid of code for absolute kallsyms

On Wed, Feb 21, 2024, at 21:26, Jann Horn wrote:
> To compile code for absolute kallsyms, you had to turn off
> KALLSYMS_BASE_RELATIVE. I think based on the way it was declared in
> Kconfig (without a string after "bool"), it wasn't even possible to
> select it.
>
> Get rid of this config option, as preparation for some kallsyms
> optimizations that would otherwise be infeasible.
>
> Signed-off-by: Jann Horn <jannh@...gle.com>

Nice catch!

The code was needed until cf8e8658100d ("arch: Remove
Itanium (IA-64) architecture"), and we missed that this
allowed the cleanup you now did.

Acked-by: Arnd Bergmann <arnd@...db.de>

     Arnd