vdo_save_components
vdo_save_components(vdo, completion);
vdo_save_components(vdo, completion);
vdo_save_components(vdo, completion);
vdo_save_components(vdo, completion);
vdo_save_components(vdo, completion);
vdo_save_components(vdo, parent);
void vdo_save_components(struct vdo *vdo, struct vdo_completion *parent);