drm_framebuffer_unregister_private
drm_framebuffer_unregister_private(fb);
drm_framebuffer_unregister_private(&rfb->base);
EXPORT_SYMBOL(drm_framebuffer_unregister_private);
void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);
drm_framebuffer_unregister_private(fb);
drm_framebuffer_unregister_private(fb);