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kbuild: Add skip_encoding_btf_enum64 option to pahole

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New pahole (version 1.24) generates by default new BTF_KIND_ENUM64 BTF tag,
which is not supported by stable kernel.

As a result the kernel with CONFIG_DEBUG_INFO_BTF option will fail to
compile with following error:

  BTFIDS  vmlinux
FAILED: load BTF from vmlinux: Invalid argument

New pahole provides --skip_encoding_btf_enum64 option to skip BTF_KIND_ENUM64
generation and produce BTF supported by stable kernel.

Adding this option to scripts/pahole-flags.sh.

This change does not have equivalent commit in linus tree, because linus tree
has support for BTF_KIND_ENUM64 tag, so it does not need to be disabled.

Signed-off-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martin Rodriguez Reboredo 2022-09-04 15:19:01 +02:00 • committed by Justin Hammond
parent 3e9ead9390
commit e2e8a3a329
1 changed files with 4 additions and 0 deletions
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4
scripts/pahole-flags.sh
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@ -17,4 +17,8 @@ if [ "${pahole_ver}" -ge "121" ]; then
extra_paholeopt="${extra_paholeopt} --btf_gen_floats"
fi
if [ "${pahole_ver}" -ge "124" ]; then
extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_enum64"
fi
echo ${extra_paholeopt}