tree: https://github.com/stffrdhrn/linux.git starfive-bad-dcache-flush head: a5c948a9cc2b8944f00056c067fb7bde19b34843 commit: eb1c3c7d70ee34a4f65bf77035c8c557caf559ac [20/39] drivers/media and video: update fb driver(flush cache) and cam sensor drivers config: riscv-allyesconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 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 # https://github.com/stffrdhrn/linux/commit/eb1c3c7d70ee34a4f65bf77035c8c55... git remote add stffrdhrn https://github.com/stffrdhrn/linux.git git fetch --no-tags stffrdhrn starfive-bad-dcache-flush git checkout eb1c3c7d70ee34a4f65bf77035c8c557caf559ac # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 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 >>): drivers/video/fbdev/starfive/starfive_fb.c: In function 'vin_frame_complete_notify': 128 | address = (unsigned int)psy->paddr; | ^ drivers/video/fbdev/starfive/starfive_fb.c: In function 'sf_fb_setcolreg': drivers/video/fbdev/starfive/starfive_fb.c:424:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] 424 | int ret = 1; | ^~~ vim +128 drivers/video/fbdev/starfive/starfive_fb.c ff76d633fd1fcc6 jack.zhu 2021-01-11 117 ff76d633fd1fcc6 jack.zhu 2021-01-11 118 #if defined(CONFIG_VIDEO_STARFIVE_VIN) ff76d633fd1fcc6 jack.zhu 2021-01-11 119 static int vin_frame_complete_notify(struct notifier_block *nb, ff76d633fd1fcc6 jack.zhu 2021-01-11 120 unsigned long val, void *v) ff76d633fd1fcc6 jack.zhu 2021-01-11 121 { ff76d633fd1fcc6 jack.zhu 2021-01-11 122 struct vin_params *psy = v; ff76d633fd1fcc6 jack.zhu 2021-01-11 123 struct sf_fb_data *sf_dev = stf_dev; ff76d633fd1fcc6 jack.zhu 2021-01-11 124 unsigned int address; ff76d633fd1fcc6 jack.zhu 2021-01-11 125 unsigned int u_addr, v_addr, size; ff76d633fd1fcc6 jack.zhu 2021-01-11 126 unsigned int y_rgb_offset, u_offset, v_offset; ff76d633fd1fcc6 jack.zhu 2021-01-11 127 ff76d633fd1fcc6 jack.zhu 2021-01-11 @128 address = (unsigned int)psy->paddr; ff76d633fd1fcc6 jack.zhu 2021-01-11 129 ff76d633fd1fcc6 jack.zhu 2021-01-11 130 if(NULL == sf_dev) { ff76d633fd1fcc6 jack.zhu 2021-01-11 131 return NOTIFY_OK; ff76d633fd1fcc6 jack.zhu 2021-01-11 132 } ff76d633fd1fcc6 jack.zhu 2021-01-11 133 ff76d633fd1fcc6 jack.zhu 2021-01-11 134 if(sf_dev->pp_conn_lcdc < 0) { ff76d633fd1fcc6 jack.zhu 2021-01-11 135 //dev_warn(sf_dev->dev, "%s NO use PPx\n",__func__); ff76d633fd1fcc6 jack.zhu 2021-01-11 136 } else { ff76d633fd1fcc6 jack.zhu 2021-01-11 137 if(sf_dev->pp[sf_dev->pp_conn_lcdc].src.format >= COLOR_RGB888_ARGB) { ff76d633fd1fcc6 jack.zhu 2021-01-11 138 u_addr = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 139 v_addr = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 140 y_rgb_offset = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 141 u_offset = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 142 v_offset = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 143 } else if (COLOR_YUV420_NV21 == sf_dev->pp[sf_dev->pp_conn_lcdc].src.format) { ff76d633fd1fcc6 jack.zhu 2021-01-11 144 size = sf_dev->display_info.xres * sf_dev->display_info.yres; ff76d633fd1fcc6 jack.zhu 2021-01-11 145 u_addr = address + size + 1; ff76d633fd1fcc6 jack.zhu 2021-01-11 146 v_addr = address + size; ff76d633fd1fcc6 jack.zhu 2021-01-11 147 y_rgb_offset = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 148 u_offset = 0; ff76d633fd1fcc6 jack.zhu 2021-01-11 149 v_offset = size; ff76d633fd1fcc6 jack.zhu 2021-01-11 150 } else { ff76d633fd1fcc6 jack.zhu 2021-01-11 151 dev_err(sf_dev->dev, "format %d not SET\n", sf_dev->pp[sf_dev->pp_conn_lcdc].src.format); ff76d633fd1fcc6 jack.zhu 2021-01-11 152 return -EINVAL; ff76d633fd1fcc6 jack.zhu 2021-01-11 153 } ff76d633fd1fcc6 jack.zhu 2021-01-11 154 pp_srcAddr_next(sf_dev, sf_dev->pp_conn_lcdc, address, u_addr, v_addr); ff76d633fd1fcc6 jack.zhu 2021-01-11 155 pp_srcOffset_cfg(sf_dev, sf_dev->pp_conn_lcdc, y_rgb_offset, u_offset, v_offset); ff76d633fd1fcc6 jack.zhu 2021-01-11 156 //pp_run(sf_dev, sf_dev->pp_conn_lcdc, PP_RUN); ff76d633fd1fcc6 jack.zhu 2021-01-11 157 } ff76d633fd1fcc6 jack.zhu 2021-01-11 158 ff76d633fd1fcc6 jack.zhu 2021-01-11 159 return NOTIFY_OK; ff76d633fd1fcc6 jack.zhu 2021-01-11 160 } ff76d633fd1fcc6 jack.zhu 2021-01-11 161 #endif ff76d633fd1fcc6 jack.zhu 2021-01-11 162 :::::: The code at line 128 was first introduced by commit :::::: ff76d633fd1fcc65037af860aa54b91cac544d2d drivers/video/fbdev and drivers/media/platform: starfive drivers added :::::: TO: jack.zhu <jack.zhu(a)starfivetech.com&gt; :::::: CC: Emil Renner Berthing <kernel(a)esmil.dk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org