linux-kernel - Re: [PATCH v6 19/20] modpost: merge two similar section mismatch warnings

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Message-ID: <CAKwvOd=O9E1RBhk-hUYNX=EuhP4qQoH0M-wQjpyEZM5QG6+==A@mail.gmail.com>
Date:   Thu, 25 May 2023 11:20:17 -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>
Subject: Re: [PATCH v6 19/20] modpost: merge two similar section mismatch warnings

On Sun, May 21, 2023 at 9:05 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> In case of section mismatch, modpost shows slightly different messages.
>
> For extable section mismatch:
>
>  "%s(%s+0x%lx): Section mismatch in reference to the %s:%s\n"
>
> For the other cases:
>
>  "%s: section mismatch in reference: %s (section: %s) -> %s (section: %s)\n"
>
> They are similar. Merge them.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Thanks for the patch!
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>
>  scripts/mod/modpost.c | 18 +++---------------
>  1 file changed, 3 insertions(+), 15 deletions(-)
>
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 852cc164c77e..e7561fa57478 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -1135,21 +1135,10 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
>
>         sec_mismatch_count++;
>
> -       switch (mismatch->mismatch) {
> -       case TEXT_TO_ANY_INIT:
> -       case DATA_TO_ANY_INIT:
> -       case TEXTDATA_TO_ANY_EXIT:
> -       case XXXINIT_TO_SOME_INIT:
> -       case XXXEXIT_TO_SOME_EXIT:
> -       case ANY_INIT_TO_ANY_EXIT:
> -       case ANY_EXIT_TO_ANY_INIT:
> -               warn("%s: section mismatch in reference: %s (section: %s) -> %s (section: %s)\n",
> -                    modname, fromsym, fromsec, tosym, tosec);
> -               break;
> -       case EXTABLE_TO_NON_TEXT:
> -               warn("%s(%s+0x%lx): Section mismatch in reference to the %s:%s\n",
> -                    modname, fromsec, (long)faddr, tosec, tosym);
> +       warn("%s: section mismatch in reference: %s (section: %s) -> %s (section: %s)\n",
> +            modname, fromsym, fromsec, tosym, tosec);
>
> +       if (mismatch->mismatch == EXTABLE_TO_NON_TEXT) {
>                 if (match(tosec, mismatch->bad_tosec))
>                         fatal("The relocation at %s+0x%lx references\n"
>                               "section \"%s\" which is black-listed.\n"
> @@ -1169,7 +1158,6 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
>                 else
>                         error("%s+0x%lx references non-executable section '%s'\n",
>                               fromsec, (long)faddr, tosec);
> -               break;
>         }
>  }
>
> --
> 2.39.2
>


-- 
Thanks,
~Nick Desaulniers