tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/pstore head: 38c18fec13fb15ac7afcaa3cec17d07630959c39 commit: 38c18fec13fb15ac7afcaa3cec17d07630959c39 [1/1] pstore/blk: Use the normal block device I/O path config: i386-randconfig-a016-20210613 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id... git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git git fetch --no-tags kees for-next/pstore git checkout 38c18fec13fb15ac7afcaa3cec17d07630959c39 # 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 >>, old ones prefixed by <<): The function __register_pstore_blk() references the function __init init_unlink(). This is often because __register_pstore_blk lacks a __init annotation or the annotation of init_unlink is wrong. -- The function __register_pstore_blk() references the function __init init_mknod(). This is often because __register_pstore_blk lacks a __init annotation or the annotation of init_mknod is wrong. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org