Re: [PATCH v3 00/15] kbuild: yet another series of cleanups (modpost, LTO, MODULE_REL_CRCS)

Masahiro Yamada
2022-05-08T19:18:05Z

On Thu, May 5, 2022 at 4:24 PM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
>
> This is the third batch of cleanups in this development cycle.
>
> 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
>
>
> Masahiro Yamada (15):
> modpost: mitigate false-negatives for static EXPORT_SYMBOL checks
> modpost: change the license of EXPORT_SYMBOL to bool type
> modpost: merge add_{intree_flag,retpoline,staging_flag} to add_header
> modpost: move *.mod.c generation to write_mod_c_files()
> kbuild: generate a list of objects in vmlinux
> kbuild: record symbol versions in *.cmd files
> 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
> modpost: simplify the ->is_static initialization
> modpost: use hlist for hash table implementation
> kbuild: make built-in.a rule robust against too long argument error
> kbuild: make *.mod rule robust against too long argument error

Only 03-06 were applied.

I will send v4 for the rest.
(I rewrote the static EXPORT checks).

>
> arch/powerpc/Kconfig | 1 -
> arch/s390/Kconfig | 1 -
> arch/um/Kconfig | 1 -
> include/asm-generic/export.h | 22 +-
> include/linux/export.h | 30 +--
> include/linux/symversion.h | 13 +
> init/Kconfig | 4 -
> kernel/module.c | 10 +-
> scripts/Kbuild.include | 4 +
> scripts/Makefile.build | 118 +++------
> scripts/Makefile.lib | 7 -
> scripts/Makefile.modfinal | 5 +-
> scripts/Makefile.modpost | 9 +-
> scripts/genksyms/genksyms.c | 18 +-
> scripts/link-vmlinux.sh | 46 ++--
> scripts/mod/file2alias.c | 2 -
> scripts/mod/list.h | 52 ++++
> scripts/mod/modpost.c | 449 ++++++++++++++++++++---------------
> scripts/mod/modpost.h | 2 +
> 19 files changed, 402 insertions(+), 392 deletions(-)
> create mode 100644 include/linux/symversion.h
>
> --
> 2.32.0
>
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--
Best Regards
Masahiro Yamada