tree: https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git nvdimm-meta head: 544e57301b9adc7628556f4b709f65c35142df47 commit: d0a096b054485476b6788ae2a071c036dcffc248 [12/23] bcache: initialize the nvm pages allocator config: openrisc-buildonly-randconfig-r001-20211027 (attached as .config) compiler: or1k-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/colyli/linux-bcache.git/commit/?id=d0a096b054485476b6788ae2a071c036dcffc248 git remote add colyli-bcache https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git git fetch --no-tags colyli-bcache nvdimm-meta git checkout d0a096b054485476b6788ae2a071c036dcffc248 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=openrisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from drivers/md/bcache/nvmpg.h:8, from drivers/md/bcache/super.c:17: >> drivers/md/bcache/nvmpg_format.h:132:19: error: 'bch_nvmpg_recs_magic' defined but not used [-Werror=unused-const-variable=] 132 | static const __u8 bch_nvmpg_recs_magic[] = { | ^~~~~~~~~~~~~~~~~~~~ >> drivers/md/bcache/nvmpg_format.h:129:19: error: 'bch_nvmpg_magic' defined but not used [-Werror=unused-const-variable=] 129 | static const __u8 bch_nvmpg_magic[] = { | ^~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/bch_nvmpg_recs_magic +132 drivers/md/bcache/nvmpg_format.h d5ca176bc66727 Coly Li 2021-07-26 128 d5ca176bc66727 Coly Li 2021-07-26 @129 static const __u8 bch_nvmpg_magic[] = { d5ca176bc66727 Coly Li 2021-07-26 130 0x17, 0xbd, 0x53, 0x7f, 0x1b, 0x23, 0xd6, 0x83, d5ca176bc66727 Coly Li 2021-07-26 131 0x46, 0xa4, 0xf8, 0x28, 0x17, 0xda, 0xec, 0xa9 }; d5ca176bc66727 Coly Li 2021-07-26 @132 static const __u8 bch_nvmpg_recs_magic[] = { d5ca176bc66727 Coly Li 2021-07-26 133 0x39, 0x25, 0x3f, 0xf7, 0x27, 0x17, 0xd0, 0xb9, d5ca176bc66727 Coly Li 2021-07-26 134 0x10, 0xe6, 0xd2, 0xda, 0x38, 0x68, 0x26, 0xae }; d5ca176bc66727 Coly Li 2021-07-26 135 :::::: The code at line 132 was first introduced by commit :::::: d5ca176bc66727740baa4c80ba1349ba25dc95f7 bcache: add initial data structures for nvm pages :::::: TO: Coly Li :::::: CC: Coly Li --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org