Extern or forward variable declaration at include/media/videobuf2-v4l2.h, line 327 References: drivers/media/common/videobuf2/videobuf2-v4l2.c, line 342 drivers/media/common/videobuf2/videobuf2-v4l2.c, line 345 drivers/media/common/videobuf2/videobuf2-v4l2.c, line 758 drivers/media/common/videobuf2/videobuf2-v4l2.c, line 1176 drivers/media/common/videobuf2/videobuf2-v4l2.c, line 1203 drivers/media/test-drivers/vicodec/vicodec-core.c, line 268 drivers/media/test-drivers/vicodec/vicodec-core.c, line 411 drivers/media/test-drivers/vicodec/vicodec-core.c, line 1953 drivers/media/test-drivers/vivid/vivid-core.c, line 775 drivers/media/v4l2-core/v4l2-mem2mem.c, line 1232 drivers/staging/media/rkvdec/rkvdec.c, line 558 drivers/staging/media/rkvdec/rkvdec.c, line 646 drivers/staging/media/rkvdec/rkvdec.c, line 663 drivers/staging/media/sunxi/cedrus/cedrus.c, line 194 drivers/staging/media/sunxi/cedrus/cedrus_dec.c, line 30 include/media/v4l2-mem2mem.h, line 814 include/media/videobuf2-v4l2.h, line 327 include/media/videobuf2-v4l2.h, line 328 include/media/videobuf2-v4l2.h, line 329