Thank you guys so much. As you said, I think my design is wrong.Because this is first time to work on kernel, I've never expected this kind of problem at all.
So, I'll start changing the whole scheme. Thank you so much for taking your time, and I really appreciate it. Jeong Ki Min -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
