Hi, I am trying to build kernel with v4l2 features enable. I added these in my defconfig file (and necessary dependancy , and compile, CONFIG_VIDEO_DEV=y CONFIG_VIDEO_V4L2=y I see those are included in the generated .config file, which is what I expected: # # Multimedia core support # CONFIG_MEDIA_CAMERA_SUPPORT=y # CONFIG_MEDIA_ANALOG_TV_SUPPORT is not set # CONFIG_MEDIA_DIGITAL_TV_SUPPORT is not set # CONFIG_MEDIA_RADIO_SUPPORT is not set # CONFIG_MEDIA_RC_SUPPORT is not set # CONFIG_MEDIA_CONTROLLER is not set CONFIG_VIDEO_DEV=y CONFIG_VIDEO_V4L2=y ... My problem is when I add CONFIG_VIDEOBUF2_CORE to my defconf, I don't that include in the generated .config file (the one that I mentioned above). CONFIG_VIDEOBUF2_CORE=y I have checked that CONFIG_VIDEOBUF2_CORE has no dependency. http://cateee.net/lkddb/web-lkddb/VIDEOBUF2_CORE.html Hence , the causes my compilation fails. Any one has any idea how to fix my problem? Thank you.