Hi kernel test robot, > Subject: [linux-next:master 5636/9540] ld.lld: error: undefined symbol: > drm_of_get_data_lanes_count_ep > > tree: > > head: 771a207d1ee9f38da8c0cee1412228f18b900bac > commit: 7a043f978ed1433bddb088a732e9bb91501ebd76 [5636/9540] drm: rcar- > du: Add RZ/G2L DSI driver > config: arm64-randconfig-r026-20221122 > compiler: clang version 16.0.0 > reproduce (this is a W=1 build): > wget -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # install arm64 cross compiling tool for clang build > # apt-get install binutils-aarch64-linux-gnu > # > git remote add linux-next > git fetch --no-tags linux-next master > git checkout 7a043f978ed1433bddb088a732e9bb91501ebd76 > # save the config file > mkdir build_dir && cp config build_dir/.config > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 > O=build_dir ARCH=arm64 SHELL=/bin/bash > > If you fix the issue, kindly add following tag where applicable > | Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All errors (new ones prefixed by >>): > > >> ld.lld: error: undefined symbol: drm_of_get_data_lanes_count_ep > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_probe) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: drm_bridge_attach > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_attach) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: > drm_atomic_get_new_connector_for_encoder > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_atomic_enable) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: devm_drm_of_get_bridge > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_host_attach) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: drm_bridge_add > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_host_attach) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: drm_bridge_remove > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_host_detach) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: > drm_atomic_helper_bridge_duplicate_state > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_bridge_ops) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: > drm_atomic_helper_bridge_destroy_state > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_bridge_ops) in archive vmlinux.a > -- > >> ld.lld: error: undefined symbol: drm_atomic_helper_bridge_reset > >>> referenced by rzg2l_mipi_dsi.c > >>> drivers/gpu/drm/rcar- > du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_bridge_ops) in archive vmlinux.a I was able to reproduce the issue and the same fix[1], will fix the issue here for clang compiler as well. Can you please apply [1] to avoid repeatedly sending the same issue for different compilers on the kernel test robot? [1] https://lore.kernel.org/linux-renesas-soc/Y3wVLU01mHp2zozI@xxxxxxxxxxxxxxxxxxxxxxxxxx/T/#t Cheers, Biju
