linux-kernel - Re: [PATCH v4 03/14] modpost: split the section mismatch checks into section-check.c

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Message-ID: <CAKwvOd=LR=UNOeWJDmM-McJ=FrCWTo8w1ox+KGMQCwCVpiUyFg@mail.gmail.com>
Date:   Mon, 9 May 2022 10:19:47 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nicolas Schier <nicolas@...sle.eu>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-modules@...r.kernel.org, linux-s390@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, Ard Biesheuvel <ardb@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        clang-built-linux <llvm@...ts.linux.dev>
Subject: Re: [PATCH v4 03/14] modpost: split the section mismatch checks into section-check.c

On Sun, May 8, 2022 at 12:10 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> modpost.c is too big, and the half of the code is for section checks.
> Split it.
>
> I fixed some style issues in the moved code.

It would be helpful for review if the split and restyle were distinct
patches.  Otherwise I can't tell what has changed.

This does lose the ability to use git blame to get more context on
some of the oddities in modpost (which I have found useful in the
past).  I don't feel strongly though.

>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
>
> Changes in v4:
>   - New patch
>
>  scripts/mod/Makefile        |    2 +-
>  scripts/mod/modpost.c       | 1202 +---------------------------------
>  scripts/mod/modpost.h       |   34 +-
>  scripts/mod/section-check.c | 1222 +++++++++++++++++++++++++++++++++++
>  4 files changed, 1240 insertions(+), 1220 deletions(-)
>  create mode 100644 scripts/mod/section-check.c
>
> diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
> index c9e38ad937fd..ca739c6c68a1 100644
> --- a/scripts/mod/Makefile
> +++ b/scripts/mod/Makefile
> @@ -5,7 +5,7 @@ CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO)
>  hostprogs-always-y     += modpost mk_elfconfig
>  always-y               += empty.o
>
> -modpost-objs   := modpost.o file2alias.o sumversion.o
> +modpost-objs   := modpost.o section-check.o file2alias.o sumversion.o
>
>  devicetable-offsets-file := devicetable-offsets.h
>
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index a78b75f0eeb0..e7e2c70a98f5 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -31,7 +31,7 @@ static bool external_module;
>  /* Only warn about unresolved symbols */
>  static bool warn_unresolved;
>
> -static int sec_mismatch_count;
> +int sec_mismatch_count;

^ this should go in modpost.h if it is to be used in two translation
units, rather than forward declaring it in section-check.c.  You did
this for the functions.
-- 
Thanks,
~Nick Desaulniers