0 _unpacked/drv_xordev.c: In function 'cdb_copy_to_user': 1 _unpacked/drv_xordev.c: 76:2: error: implicit declaration of function 'copy_to_user' 2 _unpacked/drv_xordev.c: In function 'cdb_copy_from_user': 3 _unpacked/drv_xordev.c: 80:2: error: implicit declaration of function 'copy_from_user' 4 make[3]: *** [_unpacked/drv_xordev.o] Error 1 5 make[2]: *** [_module__unpacked] Error 2 6 make[1]: *** [default] Error 2 7 Compile error. 8 9