Hi Robin, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5ee88057889bbca5f5bb96031b62b3756b33e164 commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs date: 6 months ago config: x86_64-randconfig-r025-20210115 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5b42fd8dd4e7e29125a09a41a33af7c9cb57d144) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): static const struct of_device_id vop_driver_dt_match[] = { ^ 1 warning generated. vim +/vop_driver_dt_match +1029 drivers/gpu/drm/rockchip/rockchip_vop_reg.c eb5cb6aa9a72a7 Mark Yao 2017-07-26 1028 a67719d182291b Mark Yao 2015-12-15 @1029 static const struct of_device_id vop_driver_dt_match[] = { f7673453506035 Mark Yao 2015-12-15 1030 { .compatible = "rockchip,rk3036-vop", f7673453506035 Mark Yao 2015-12-15 1031 .data = &rk3036_vop }, 460c3b0029923a Sandy Huang 2017-11-14 1032 { .compatible = "rockchip,rk3126-vop", 460c3b0029923a Sandy Huang 2017-11-14 1033 .data = &rk3126_vop }, 570913e0b1bebe Sandy Huang 2018-06-26 1034 { .compatible = "rockchip,px30-vop-big", 570913e0b1bebe Sandy Huang 2018-06-26 1035 .data = &px30_vop_big }, 570913e0b1bebe Sandy Huang 2018-06-26 1036 { .compatible = "rockchip,px30-vop-lit", 570913e0b1bebe Sandy Huang 2018-06-26 1037 .data = &px30_vop_lit }, f4a6de855eae10 Mark Yao 2018-12-29 1038 { .compatible = "rockchip,rk3066-vop", f4a6de855eae10 Mark Yao 2018-12-29 1039 .data = &rk3066_vop }, 428e15cc41e360 Heiko Stuebner 2018-08-30 1040 { .compatible = "rockchip,rk3188-vop", 428e15cc41e360 Heiko Stuebner 2018-08-30 1041 .data = &rk3188_vop }, b51502add7afc5 Mark Yao 2016-08-15 1042 { .compatible = "rockchip,rk3288-vop", b51502add7afc5 Mark Yao 2016-08-15 1043 .data = &rk3288_vop }, eb5cb6aa9a72a7 Mark Yao 2017-07-26 1044 { .compatible = "rockchip,rk3368-vop", eb5cb6aa9a72a7 Mark Yao 2017-07-26 1045 .data = &rk3368_vop }, eb5cb6aa9a72a7 Mark Yao 2017-07-26 1046 { .compatible = "rockchip,rk3366-vop", eb5cb6aa9a72a7 Mark Yao 2017-07-26 1047 .data = &rk3366_vop }, 0a63bfd046bbc8 Mark Yao 2016-04-20 1048 { .compatible = "rockchip,rk3399-vop-big", 0a63bfd046bbc8 Mark Yao 2016-04-20 1049 .data = &rk3399_vop_big }, 0a63bfd046bbc8 Mark Yao 2016-04-20 1050 { .compatible = "rockchip,rk3399-vop-lit", 0a63bfd046bbc8 Mark Yao 2016-04-20 1051 .data = &rk3399_vop_lit }, eb5cb6aa9a72a7 Mark Yao 2017-07-26 1052 { .compatible = "rockchip,rk3228-vop", eb5cb6aa9a72a7 Mark Yao 2017-07-26 1053 .data = &rk3228_vop }, eb5cb6aa9a72a7 Mark Yao 2017-07-26 1054 { .compatible = "rockchip,rk3328-vop", eb5cb6aa9a72a7 Mark Yao 2017-07-26 1055 .data = &rk3328_vop }, a67719d182291b Mark Yao 2015-12-15 1056 {}, a67719d182291b Mark Yao 2015-12-15 1057 }; a67719d182291b Mark Yao 2015-12-15 1058 MODULE_DEVICE_TABLE(of, vop_driver_dt_match); a67719d182291b Mark Yao 2015-12-15 1059 :::::: The code at line 1029 was first introduced by commit :::::: a67719d182291bf62c6093545b9af27f0431cbeb drm/rockchip: vop: spilt register related into rockchip_reg_vop.c :::::: TO: Mark Yao <mark.yao(a)rock-chips.com&gt; :::::: CC: Mark Yao <mark.yao(a)rock-chips.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org