linux-kernel - Re: [PATCH v2] scripts: Exclude Rust CUs with pahole

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Date:   Sun, 8 Jan 2023 15:51:50 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Martin Rodriguez Reboredo <yakoyoku@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Eric Curtin <ecurtin@...hat.com>, Neal Gompa <neal@...pa.dev>,
        bpf@...r.kernel.org, rust-for-linux@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>, Yonghong Song <yhs@...com>
Subject: Re: [PATCH v2] scripts: Exclude Rust CUs with pahole

On Sun, Jan 8, 2023 at 3:14 AM Martin Rodriguez Reboredo
<yakoyoku@...il.com> wrote:
>
> Version 1.24 of pahole has the capability to exclude compilation units

It would be nice to have a reference ("...of pahole [1][2]") to the
commits that introduced it in `pahole` -- especially the second one
below has a nice commit message about the use case for this patch:

    Link: https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=49358dfe2aaae4e90b072332c3e324019826783f
[1]
    Link: https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=8ee363790b7437283c53090a85a9fec2f0b0fbc4
[2]

> (CUs) of specific languages. Rust, as of writing, is not currently
> supported by pahole and if it's used with a build that has BTF debugging
> enabled it results in malformed kernel and module binaries (see
> Rust-for-Linux/linux#735). So it's better for pahole to exclude Rust

I think this came from a rendered link from GitHub, so please
transform it into a link since otherwise people may be confused where
to find it:

    Link: https://github.com/Rust-for-Linux/linux/issues/735 [3]

> Reviewed-by: Eric Curtin <ecurtin@...hat.com>
> Tested-by: Eric Curtin <ecurtin@...hat.com>
> Reviewed-by: Neal Gompa <neal@...pa.dev>
> Tested-by: Neal Gompa <neal@...pa.dev>

Given the patch has had non-trivial changes (in fact, in this case, it
fundamentally changed the implementation), these tags should be
removed and requested again.

Thanks for this!

Acked-by: Miguel Ojeda <ojeda@...nel.org>

Cheers,
Miguel