Hi "Alice, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on renesas-drivers/renesas-clk] [also build test WARNING on vkoul-dmaengine/next linuxtv-media/master renesas-drivers/renesas-pinctrl renesas-devel/next linus/master v5.12-rc8 next-20210416] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Alice-Guo-OSS/support-soc_device... base: https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git renesas-clk config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-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/0day-ci/linux/commit/5dc133669083c08a14f24be6e24b5aa18... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alice-Guo-OSS/support-soc_device_match-to-return-EPROBE_DEFER/20210419-123109 git checkout 5dc133669083c08a14f24be6e24b5aa1840836c7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm 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/gpu/drm/omapdrm/dss/dpi.c: In function 'dpi_init_regulator': 686 | soc = soc_device_match(dpi_soc_devices); | ^ vim +/const +686 drivers/gpu/drm/omapdrm/dss/dpi.c 676 677 static int dpi_init_regulator(struct dpi_data *dpi) 678 { 679 struct regulator *vdds_dsi; 680 struct soc_device_attribute *soc; 681 682 /* 683 * The DPI uses the DSI VDDS on OMAP34xx, OMAP35xx, OMAP36xx, AM37xx and 684 * DM37xx only. 685 */ 687 if (!IS_ERR(soc) && !soc) 688 return 0; 689 690 vdds_dsi = devm_regulator_get(&dpi->pdev->dev, "vdds_dsi"); 691 if (IS_ERR(vdds_dsi)) { 692 if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER) 693 DSSERR("can't get VDDS_DSI regulator\n"); 694 return PTR_ERR(vdds_dsi); 695 } 696 697 dpi->vdds_dsi_reg = vdds_dsi; 698 699 return 0; 700 } 701 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org