tree: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git pm_guards head: d931fdf9f398096d8ad63a552ada39758f92bf96 commit: 9507adc7eae91f8d1593c87d25a52cba634faafd [53/89] iio:adc:palmas_gpadc: Switch from CONFIG_PM guards to pm_ptr() / __maybe_unused config: hexagon-randconfig-r005-20211122 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c133fb321f7ca6083ce15b6aa5bf89de6600e649) 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/jic23/iio.git/commit/?id=... git remote add jic23-iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git git fetch --no-tags jic23-iio pm_guards git checkout 9507adc7eae91f8d1593c87d25a52cba634faafd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 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 dev_pm_ops palmas_pm_ops = { ^ 1 warning generated. vim +/palmas_pm_ops +825 drivers/iio/adc/palmas_gpadc.c e08e19c331fb24 H. Nikolaus Schaller 2015-10-16 824 e08e19c331fb24 H. Nikolaus Schaller 2015-10-16 @825 static const struct dev_pm_ops palmas_pm_ops = { e08e19c331fb24 H. Nikolaus Schaller 2015-10-16 826 SET_SYSTEM_SLEEP_PM_OPS(palmas_gpadc_suspend, e08e19c331fb24 H. Nikolaus Schaller 2015-10-16 827 palmas_gpadc_resume) e08e19c331fb24 H. Nikolaus Schaller 2015-10-16 828 }; e08e19c331fb24 H. Nikolaus Schaller 2015-10-16 829 :::::: The code at line 825 was first introduced by commit :::::: e08e19c331fb249e6dc86365ee80d16045c4aeb1 iio:adc: add iio driver for Palmas (twl6035/7) gpadc :::::: TO: H. Nikolaus Schaller <hns(a)goldelico.com&gt; :::::: CC: Jonathan Cameron <jic23(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org