Hi Cai, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 6b75d88fa81b122cce37ebf17428a849ccd3d0f1 commit: b36061c2ea5bdacf51305f8bc79f29595b343eb6 regulator: ti-abb: Kconfig: Add helper dependency on COMPILE_TEST date: 8 weeks ago config: h8300-randconfig-r035-20210929 (attached as .config) compiler: h8300-linux-gcc (GCC) 11.2.0 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://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 b36061c2ea5bdacf51305f8bc79f29595b343eb6 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=h8300 SHELL=/bin/bash drivers/regulator/ 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 >>): vim +169 drivers/regulator/ti-abb-regulator.c 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 160 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 161 /** 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 162 * ti_abb_wait_tranx() - waits for ABB tranxdone event 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 163 * @dev: device 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 164 * @abb: pointer to the abb instance 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 165 * 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 166 * Return: 0 on success or -ETIMEDOUT if the event is not cleared on time. 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 167 */ 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 168 static int ti_abb_wait_txdone(struct device *dev, struct ti_abb *abb) 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 @169 { 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 170 int timeout = 0; 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 171 bool status; 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 172 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 173 while (timeout++ <= abb->settling_time) { 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 174 status = ti_abb_check_txdone(abb); 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 175 if (status) f64db548799e03 Axel Lin 2019-09-29 176 return 0; 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 177 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 178 udelay(1); 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 179 } 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 180 f64db548799e03 Axel Lin 2019-09-29 181 dev_warn_ratelimited(dev, "%s:TRANXDONE timeout(%duS) int=0x%08x\n", 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 182 __func__, timeout, readl(abb->int_base)); 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 183 return -ETIMEDOUT; 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 184 } 40b1936efebdb9 Andrii.Tseglytskyi 2013-05-02 185 :::::: The code at line 169 was first introduced by commit :::::: 40b1936efebdb9c31d9ed6fe59055f71ea366509 regulator: Introduce TI Adaptive Body Bias(ABB) on-chip LDO driver :::::: TO: Andrii.Tseglytskyi <andrii.tseglytskyi(a)ti.com&gt; :::::: CC: Mark Brown <broonie(a)opensource.wolfsonmicro.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org