This is a note to let you know that I've just added the patch titled
kbuild: Add skip_encoding_btf_enum64 option to pahole
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kbuild-add-skip_encoding_btf_enum64-option-to-pahole.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From yakoyoku@xxxxxxxxx Tue Oct 18 08:44:34 2022
From: Martin Rodriguez Reboredo <yakoyoku@xxxxxxxxx>
Date: Fri, 16 Sep 2022 14:12:34 -0300
Subject: kbuild: Add skip_encoding_btf_enum64 option to pahole
To: stable@xxxxxxxxxxxxxxx
Cc: bpf@xxxxxxxxxxxxxxx, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, Jiri Olsa <jolsa@xxxxxxxxxx>, Andrii Nakryiko <andrii@xxxxxxxxxx>, Thorsten Leemhuis <linux@xxxxxxxxxxxxx>
Message-ID: <20220916171234.841556-1-yakoyoku@xxxxxxxxx>
From: Martin Rodriguez Reboredo <yakoyoku@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
scripts/pahole-flags.sh | 4 ++++
1 file changed, 4 insertions(+)
--- a/scripts/pahole-flags.sh
+++ b/scripts/pahole-flags.sh
@@ -20,4 +20,8 @@ if [ "${pahole_ver}" -ge "122" ]; then
extra_paholeopt="${extra_paholeopt} -j"
fi
+if [ "${pahole_ver}" -ge "124" ]; then
+ extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_enum64"
+fi
+
echo ${extra_paholeopt}
Patches currently in stable-queue which might be from yakoyoku@xxxxxxxxx are
queue-5.19/kbuild-add-skip_encoding_btf_enum64-option-to-pahole.patch
