On Wed, Aug 25, 2021 at 6:48 PM Daniel Xu [off-list ref] wrote:

This commit fixes linker errors along the lines of:

    s390-linux-ld: task_iter.c:(.init.text+0xa4): undefined reference to `btf_task_struct_ids'`

Fix by defining btf_task_struct_ids unconditionally in kernel/bpf/btf.c
since there exists code that unconditionally uses btf_task_struct_ids.

Reported-by: kernel test robot <redacted>
Signed-off-by: Daniel Xu <redacted>

Applied. Thanks