linux-kernel - Re: [PATCH 1/2] kallsyms: add kallsyms_seqs_of

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Date:   Tue, 7 Mar 2023 10:35:12 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-kbuild@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 1/2] kallsyms: add kallsyms_seqs_of_names to list of
 special symbols

On Mon, Mar 6, 2023 at 7:15 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
>
> My randconfig build setup ran into another kallsyms warning:
>
> Inconsistent kallsyms data
> Try make KALLSYMS_EXTRA_PASS=1 as a workaround
>
> After adding some debugging code to kallsyms.c, I saw that the recently
> added kallsyms_seqs_of_names symbol can sometimes cause the second stage
> table to be slightly longer than the first stage, which makes the
> build inconsistent.
>
> Add it to the exception table that contains all other kallsyms-generated
> symbols.
>
> Fixes: 60443c88f3a8 ("kallsyms: Improve the performance of kallsyms_lookup_name()")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  scripts/kallsyms.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
> index 8a68179a98a3..a239a87e7bec 100644
> --- a/scripts/kallsyms.c
> +++ b/scripts/kallsyms.c
> @@ -119,6 +119,7 @@ static bool is_ignored_symbol(const char *name, char type)
>                 "kallsyms_markers",
>                 "kallsyms_token_table",
>                 "kallsyms_token_index",
> +               "kallsyms_seqs_of_names",
>                 /* Exclude linker generated symbols which vary between passes */
>                 "_SDA_BASE_",           /* ppc */
>                 "_SDA2_BASE_",          /* ppc */
> --
> 2.39.2
>


Applied to linux-kbuild/fixes.
Thanks.


-- 
Best Regards
Masahiro Yamada