bpf_trampoline_update
ret = bpf_trampoline_update(tr, false /* lock_direct_mutex */);
ret = bpf_trampoline_update(tr, false /* lock_direct_mutex */);
static int bpf_trampoline_update(struct bpf_trampoline *tr, bool lock_direct_mutex);
err = bpf_trampoline_update(tr, true /* lock_direct_mutex */);
return bpf_trampoline_update(tr, true /* lock_direct_mutex */);