failed to create kprobe 'mutex_lock' using klockstat in kernel 6.7

Hi, when I using klockstat in libbpf_example, I have the following problem,
```bash
libbpf: prog 'kprobe_mutex_lock': failed to create kprobe 'mutex_lock+0x0' pey
libbpf: prog 'kprobe_mutex_lock': failed to auto-attach: -2
failed to attach BPF object
```

it seems the latest kernel does not have mutex_lock. Instead, it has __mutex_lock, and there is a similar problem for kprobe_mutex_lock_interruptible. Do you have any idea how to fix that?

Much thanks.