Re: [PATCH] kbuild: fix Clang LTO with CONFIG_OBJTOOL=n

[Song Liu]

On Fri, Jan 31, 2025 at 6:04 AM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote:
>
> Since commit bede169618c6 ("kbuild: enable objtool for *.mod.o and
> additional kernel objects"), Clang LTO builds do not perform any
> optimizations when CONFIG_OBJTOOL is disable (e.g., for ARCH=arm64).
> This is because every LLVM bitcode file is immediately converted to
> ELF format before the object files are linked together.
>
> This commit fixes the breakage.
>
> Fixes: bede169618c6 ("kbuild: enable objtool for *.mod.o and additional kernel objects")
> Reported-by: Yonghong Song <yonghong.song@xxxxxxxxx>
> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>

Tested-by: Song Liu <song@xxxxxxxxxx>