v4l2_querymenu   3064 drivers/media/v4l2-core/v4l2-ctrls.c int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
v4l2_querymenu   1756 include/uapi/linux/videodev2.h struct v4l2_querymenu {