bpf_async_schedule_op
return bpf_async_schedule_op(&t->cb, BPF_ASYNC_START, nsecs, mode);
(void)bpf_async_schedule_op(cb, BPF_ASYNC_CANCEL, 0, 0);
return bpf_async_schedule_op(&w->cb, BPF_ASYNC_START, 0, 0);
ret = bpf_async_schedule_op(cb, BPF_ASYNC_CANCEL, 0, 0);