I have created a module in which i am trying to create file. i hav used : mm_segmen_t old_fs; old_fs = get_fs(); set_fs(KERNEL_DS); /* syscalls go here */ fd = sys_open( my_file, O_CREAT | O_WRONLY, 0 ); set_fs(old_fs); It is compiled without error and when i try to insert it then i get an error saying. Unable to insert module -1 unknown symbol in module. i looked in /var/log/messages and found unknown symbol : sys_open and sys_write these are the system calls that i have used in my module. i have also tried EXPORT_SYMBOL, but of no use. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ