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SubjectRe: [PATCH v5 00/12] kbuild: yet another series of cleanups (modpost, LTO, MODULE_REL_CRCS, export.h)
Hi Masahiro,

On Thu, May 12, 2022 at 01:45:02AM +0900, Masahiro Yamada wrote:
>
> This is the third batch of cleanups in this development cycle.
>
> Major changes in v5:
> - Fix build errors
> - More cleanups
>
> 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
>
>
>
> Masahiro Yamada (12):
> 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

I applied this series to your latest kbuild branch, built an Arch
Linux x86_64 config and Fedora aarch64 config with
CONFIG_LTO_CLANG_FULL=y then CONFIG_LTO_CLANG_THIN=y, and boot tested
each kernel in QEMU with a full userspace. I did not notice any new
warnings/errors and everything appears to work fine.

Tested-by: Nathan Chancellor <nathan@kernel.org>

Cheers,
Nathan

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