hacking functions

Hello friends friends i need ur help . In the below mentioned program i am intercepting makedir system call so that user would not be able to make any directories . But i am getting " unresolved sysmbol sys_call_table "

kernel module

Hello friends friends i need ur help . In the below mentioned program i am intercepting makedir system call so that user would not be able to make any directories . But i am getting " unresolved sysmbol sys_call_table "