tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: daadb3bd0e8d3e317e36bc2c1542e86c528665e5 commit: 77e2a04745ff8e391ad402e2d2d1157a5d3a7ebc ACPI: PCC: Implement OperationRegion handler for the PCC Type 3 subtype date: 8 days ago config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220112/202201122308.6u2N4BuL-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # 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 77e2a04745ff8e391ad402e2d2d1157a5d3a7ebc # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/acpi/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +/pcc_ctx +34 drivers/acpi/acpi_pcc.c 33 35 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org