求教各位，小弟不知道到底是哪个文件出现错误？

Question

ema@ema3530:~/Source/linux-2.6.39-rc7$ make uImage
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  LD      drivers/media/video/videodev.o
drivers/media/video/v4l2-ioctl.o: In function `__crc_media_device_unregister_entity':
v4l2-ioctl.c*ABS*+0x303c3323): multiple definition of `__crc_media_device_unregister_entity'
drivers/media/video/v4l2-device.o: In function `__crc_media_device_unregister_entity':
v4l2-device.c*ABS*+0x22336447): multiple definition of `__crc_media_device_unregister_entity'
drivers/media/video/v4l2-ctrls.o: In function `__crc_media_device_unregister_entity':
v4l2-ctrls.c*ABS*+0xb9d21f64): multiple definition of `__crc_media_device_unregister_entity'
drivers/media/video/v4l2-subdev.o: In function `__crc_media_device_unregister_entity':
v4l2-subdev.c*ABS*+0xb9d21f64): multiple definition of `__crc_media_device_unregister_entity'
make[3]: *** [drivers/media/video/videodev.o] Error 1
make[2]: *** [drivers/media/video] Error 2
make[1]: *** [drivers/media] Error 2
make: *** [drivers] Error 2

求教了！