關於make的新手問題 - Linux

想請教各位先進這問題是出在哪裡~

小弟用的是raspberry pi 系統是raspbian正在make一個driver

以下是我執行的指令
============================================================================
root@raspberrypi:/home/pi/driver# make -f Makefile.standalone clean
make -C /lib/modules/3.2.27+/build SUBDIRS=/home/pi/driver clean
make[1]: Entering directory `/usr/src/linux'
CLEAN /home/pi/driver/.tmp_versions
CLEAN /home/pi/driver/Module.symvers
make[1]: Leaving directory `/usr/src/linux'

root@raspberrypi:/home/pi/driver# make -f Makefile.standalone
make -C /lib/modules/3.2.27+/build SUBDIRS=/home/pi/driver modules
make[1]: Entering directory `/usr/src/linux'
CC [M] /home/pi/driver/stk11xx-usb.o
CC [M] /home/pi/driver/stk11xx-v4l.o
CC [M] /home/pi/driver/stk11xx-sysfs.o
CC [M] /home/pi/driver/stk11xx-dev.o
CC [M] /home/pi/driver/stk11xx-buf.o
CC [M] /home/pi/driver/stk11xx-bayer.o
CC [M] /home/pi/driver/stk11xx-dev-0408.o
CC [M] /home/pi/driver/stk11xx-dev-0500.o
CC [M] /home/pi/driver/stk11xx-dev-a311.o
CC [M] /home/pi/driver/stk11xx-dev-a821.o
CC [M] /home/pi/driver/stk11xx-dev-6a31.o
CC [M] /home/pi/driver/stk11xx-dev-6a33.o
CC [M] /home/pi/driver/stk11xx-dev-6a51.o
CC [M] /home/pi/driver/stk11xx-dev-6a54.o
CC [M] /home/pi/driver/stk11xx-dev-6d51.o
LD [M] /home/pi/driver/stk11xx.o
Building modules, stage 2.
MODPOST 1 modules
WARNING: "video_device_release" [/home/pi/driver/stk11xx.ko] undefined!
WARNING: "video_usercopy" [/home/pi/driver/stk11xx.ko] undefined!
WARNING: "__video_register_device" [/home/pi/driver/stk11xx.ko] undefined!
WARNING: "video_device_alloc" [/home/pi/driver/stk11xx.ko] undefined!
WARNING: "video_unregister_device" [/home/pi/driver/stk11xx.ko] undefined!
WARNING: "video_devdata" [/home/pi/driver/stk11xx.ko] undefined!
CC /home/pi/driver/stk11xx.mod.o
LD [M] /home/pi/driver/stk11xx.ko
make[1]: Leaving directory `/usr/src/linux'
=============================================================================
請問stk11xx.ko都顯示undefined是什麼意思

我ls也有看到這個檔案~~

小弟新手如果問題太智障也希望能跟我解答一下 非常感謝您!!! 謝謝

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