Hi Mihai, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linux/master] [also build test WARNING on soc/for-next linus/master v5.11-rc7] [cannot apply to char-misc/char-misc-testing next-20210211] [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/Mihai-Carabas/misc-pvpanic-split... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2ab38c17aac10bf55ab3efde4c4db3893d8691d2 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/0day-ci/linux/commit/17d14b4802b75b93f10e01153b0e395f6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mihai-Carabas/misc-pvpanic-split-up-generic-and-platform-dependent-code/20210212-181711 git checkout 17d14b4802b75b93f10e01153b0e395f6a638492 # 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; All warnings (new ones prefixed by >>): 47 | void pvpanic_probe(void __iomem *pbase) | ^~~~~~~~~~~~~ 54 | void pvpanic_remove(void) | ^~~~~~~~~~~~~~ vim +/pvpanic_probe +47 drivers/misc/pvpanic/pvpanic-common.c 46 48 { 49 base = pbase; 50 atomic_notifier_chain_register(&panic_notifier_list, 51 &pvpanic_panic_nb); 52 } 53 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org