elem_ops 2003 kernel/bpf/btf.c const struct btf_kind_operations *elem_ops; elem_ops 2009 kernel/bpf/btf.c elem_ops = btf_type_ops(elem_type); elem_ops 2015 kernel/bpf/btf.c elem_ops->seq_show(btf, elem_type, elem_type_id, data,