On Tue, Oct 08, 2019 at 10:40:54AM +0800, YueHaibing wrote: > If DEM_QXL is y and DRM_TTM_HELPER is m, building fails: > > drivers/gpu/drm/qxl/qxl_object.o: undefined reference to `drm_gem_ttm_print_info' > > Select DRM_TTM_HELPER to fix this. Queued up for drm-misc-next. thanks, Gerd