tree: https://github.com/alexandrebelloni/linux rtc/pcf8523 head: 3c217681353e4be3e29506001790a6566fada426 commit: b55c5f88ffa528792b6275b0bc3775d2b8a7739e [2/8] rtc: pcf8523: switch to devm_rtc_allocate_device config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/alexandrebelloni/linux/commit/b55c5f88ffa528792b6275b0... git remote add alexandrebelloni https://github.com/alexandrebelloni/linux git fetch --no-tags alexandrebelloni rtc/pcf8523 git checkout b55c5f88ffa528792b6275b0bc3775d2b8a7739e # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the alexandrebelloni/rtc/pcf8523 HEAD 3c217681353e4be3e29506001790a6566fada426 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): drivers/rtc/rtc-pcf8523.c: In function 'pcf8523_probe': 365 | return devm_rtc_register_device(rtc); | ^~~~~~~~~~~~~~~~~~~~~~~~ | rtc_register_device cc1: some warnings being treated as errors vim +365 drivers/rtc/rtc-pcf8523.c 340 341 static int pcf8523_probe(struct i2c_client *client, 342 const struct i2c_device_id *id) 343 { 344 struct rtc_device *rtc; 345 int err; 346 347 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) 348 return -ENODEV; 349 350 err = pcf8523_load_capacitance(client); 351 if (err < 0) 352 dev_warn(&client->dev, "failed to set xtal load capacitance: %d", 353 err); 354 355 err = pcf8523_set_pm(client, 0); 356 if (err < 0) 357 return err; 358 359 rtc = devm_rtc_allocate_device(&client->dev); 360 if (IS_ERR(rtc)) 361 return PTR_ERR(rtc); 362 363 rtc->ops = &pcf8523_rtc_ops; 364 366 } 367 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org