linux-kernel - Re: [PATCH v2 2/5] tools include: add dis-asm-compat.h to handle version differences

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Message-ID: <fc1be6d4-446b-2b34-21cb-5e364742c3a2@isovalent.com>
Date:   Tue, 5 Jul 2022 14:44:07 +0100
From:   Quentin Monnet <quentin@...valent.com>
To:     Andres Freund <andres@...razel.de>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Sedat Dilek <sedat.dilek@...il.com>
Subject: Re: [PATCH v2 2/5] tools include: add dis-asm-compat.h to handle
 version differences

On 03/07/2022 22:25, Andres Freund wrote:
> binutils changed the signature of init_disassemble_info(), which now causes
> compilation failures for tools/{perf,bpf}, e.g. on debian unstable.
> Relevant binutils commit:
> https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=60a3da00bd5407f07
> 
> This commit introduces a wrapper for init_disassemble_info(), to avoid
> spreading #ifdef DISASM_INIT_STYLED to a bunch of places. Subsequent
> commits will use it to fix the build failures.
> 
> It likely is worth adding a wrapper for disassember(), to avoid the already
> existing DISASM_FOUR_ARGS_SIGNATURE ifdefery.
> 
> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: Sedat Dilek <sedat.dilek@...il.com>
> Cc: Quentin Monnet <quentin@...valent.com>
> Link: http://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@alap3.anarazel.de
> Signed-off-by: Andres Freund <andres@...razel.de>
> ---
>  tools/include/tools/dis-asm-compat.h | 53 ++++++++++++++++++++++++++++
>  1 file changed, 53 insertions(+)
>  create mode 100644 tools/include/tools/dis-asm-compat.h
> 
> diff --git a/tools/include/tools/dis-asm-compat.h b/tools/include/tools/dis-asm-compat.h
> new file mode 100644
> index 000000000000..d1d003ee3e2f
> --- /dev/null
> +++ b/tools/include/tools/dis-asm-compat.h
> @@ -0,0 +1,53 @@
> +/* SPDX-License-Identifier: GPL-2.0 */

Any chance you could contribute this wrapper as dual-licenced
(GPL-2.0-only OR BSD-2-Clause), for better compatibility with the rest
of bpftool's code?

The rest of the set looks good to me. Thanks a lot for this work!
Quentin