drm_master_get
dev->master = drm_master_get(fpriv->master);
file_priv->master = drm_master_get(dev->master);
EXPORT_SYMBOL(drm_master_get);
master = drm_master_get(file_priv->master);
lessee->lessor = drm_master_get(lessor);
struct drm_master *drm_master_get(struct drm_master *master);