kernel/bpf/verifier.c:3448:20: warning: unused function 'bt_set_slot' kernel/bpf/verifier.c:3453:20: warning: unused function 'bt_clear_slot' kernel/bpf/verifier.c:3488:20: warning: unused function 'bt_is_slot_set' In the following kernel version: name: linux-next url:https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git branch: next-20231211 commit: bbd220ce4e29ed55ab079007cff0b550895258eb