register_jprobe always fails with -22

[Naruto Nguyen <narutonguyen2018@xxxxxxxxx>]

Hi everyone,

I tried to write a sample jprobe as the link
https://bugzilla.redhat.com/show_bug.cgi?id=1275809 (the sample is
attached in the link). However the function register_jprobes always
return -22 or -2. Could you please let me know what these errors means
and how to fix it?

Thanks,
Brs,
Naruto