bpf_kfunc_implicit_arg_legacy
extern int bpf_kfunc_implicit_arg_legacy(int a, int b) __weak __ksym;
return bpf_kfunc_implicit_arg_legacy(3, 4);
__bpf_kfunc int bpf_kfunc_implicit_arg_legacy(int a, int b, struct bpf_prog_aux *aux);
BTF_ID_FLAGS(func, bpf_kfunc_implicit_arg_legacy, KF_IMPLICIT_ARGS)
return bpf_kfunc_implicit_arg_legacy(a, b, aux);