i have some problem....
i wrote kernel module for regis my syscall to kernel
on init_module function i wrote this code
sys_call_table[259] = my_sys_call1;
sys_call_table[260] = my_sys_call2;
sys_call_table[261] = my_sys_call3;

but when i call my syscall on user application via _syscallx() macro -> i can call only my_sys_call1 to work properly but other syscall (my_sys_call2 and my_sys_call3) generated error number 38 = Function not implement.... How to fix this problem ?

Thanks for your time
Sasin