linux-kernel - Re: [PATCH v4 00/14] kbuild: yet another series of cleanups (modpost, LTO, MODULE_REL

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Message-ID: <CAK7LNAQtedww_RiemfTV7Ls=M01iKJhY14G3TiuAg=C3bvJjww@mail.gmail.com>
Date:   Mon, 9 May 2022 13:24:33 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-modules <linux-modules@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>
Subject: Re: [PATCH v4 00/14] kbuild: yet another series of cleanups (modpost,
 LTO, MODULE_REL_CRCS, export.h)

On Mon, May 9, 2022 at 4:09 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> This is the third batch of cleanups in this development cycle.
>
> Major changes in v4:
>  - Move static EXPORT_SYMBOL check to a script
>  - Some refactoring
>
> Major changes in v3:
>
>  - Generate symbol CRCs as C code, and remove CONFIG_MODULE_REL_CRCS.
>
> Major changes in v2:
>
>  - V1 did not work with CONFIG_MODULE_REL_CRCS.
>    I fixed this for v2.
>
>  - Reflect some review comments in v1
>
>  - Refactor the code more
>
>  - Avoid too long argument error

This series is available at
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
lto-cleanup-v4




>
>
> Masahiro Yamada (14):
>   modpost: remove left-over cross_compile declaration
>   modpost: change the license of EXPORT_SYMBOL to bool type
>   modpost: split the section mismatch checks into section-check.c
>   modpost: add sym_find_with_module() helper
>   modpost: extract symbol versions from *.cmd files
>   kbuild: link symbol CRCs at final link, removing
>     CONFIG_MODULE_REL_CRCS
>   kbuild: stop merging *.symversions
>   genksyms: adjust the output format to modpost
>   kbuild: do not create *.prelink.o for Clang LTO or IBT
>   kbuild: check static EXPORT_SYMBOL* by script instead of modpost
>   kbuild: make built-in.a rule robust against too long argument error
>   kbuild: make *.mod rule robust against too long argument error
>   kbuild: add cmd_and_savecmd macro
>   kbuild: rebuild multi-object modules when objtool is updated
>
>  arch/powerpc/Kconfig            |    1 -
>  arch/s390/Kconfig               |    1 -
>  arch/um/Kconfig                 |    1 -
>  include/asm-generic/export.h    |   22 +-
>  include/linux/export-internal.h |   16 +
>  include/linux/export.h          |   30 +-
>  init/Kconfig                    |    4 -
>  kernel/module.c                 |   10 +-
>  scripts/Kbuild.include          |   10 +-
>  scripts/Makefile.build          |  134 +--
>  scripts/Makefile.lib            |    7 -
>  scripts/Makefile.modfinal       |    5 +-
>  scripts/Makefile.modpost        |    9 +-
>  scripts/check-local-export      |   48 +
>  scripts/genksyms/genksyms.c     |   18 +-
>  scripts/link-vmlinux.sh         |   33 +-
>  scripts/mod/Makefile            |    2 +-
>  scripts/mod/modpost.c           | 1499 ++++---------------------------
>  scripts/mod/modpost.h           |   35 +-
>  scripts/mod/section-check.c     | 1222 +++++++++++++++++++++++++
>  20 files changed, 1551 insertions(+), 1556 deletions(-)
>  create mode 100644 include/linux/export-internal.h
>  create mode 100755 scripts/check-local-export
>  create mode 100644 scripts/mod/section-check.c
>
> --
> 2.32.0
>
> --
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-- 
Best Regards
Masahiro Yamada