On Fri, Sep 16, 2022 at 11:21:46AM +0100, Thorsten Leemhuis wrote:
On 06.09.22 14:31, Greg Kroah-Hartman wrote:
From: Martin Rodriguez Reboredo yakoyoku@gmail.com
New pahole (version 1.24) generates by default new BTF_KIND_ENUM64 BTF tag, which is not supported by stable kernel.
Martin, when you wrote "not supported by stable kernel", did you mean just 5.15.y or 5.19.y as well? Because I ran into...
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
...this compile error when compiling 5.19.9 for F37 and from a quick look into this it seems this was caused by a update of dwarves to 1.24 that recently landed in that distribution. This patch seems to fix the problem (it got past the point of the error, but modules are still compiling).
hi, IIUC Martin planned to send that for 5.19, I can do that if needed
jirka
Ciao, Thorsten
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
scripts/pahole-flags.sh | 4 ++++ 1 file changed, 4 insertions(+)
--- a/scripts/pahole-flags.sh +++ b/scripts/pahole-flags.sh @@ -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}