tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b605fdc54c2b28c30ef06d9db99282d8a32ae4be commit: 56cf0968350b261964a2e0e51bd746be26772e38 [2851/2855] Merge branch 'akpm-current/current' config: arm-randconfig-r021-20220124 (https://download.01.org/0day-ci/archive/20220129/202201290703.o2mk3Lsi-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-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/next/linux-next.git/commit/?id=56cf0968350b261964a2e0e51bd746be26772e38 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 56cf0968350b261964a2e0e51bd746be26772e38 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: fs/btrfs/block-group.o: in function `calculate_global_root_id': >> fs/btrfs/block-group.c:2463: undefined reference to `__aeabi_uldivmod' vim +2463 fs/btrfs/block-group.c 4358d9635a16a7 Josef Bacik 2019-06-20 2447 f498cd59825cbf Josef Bacik 2021-12-15 2448 /* f498cd59825cbf Josef Bacik 2021-12-15 2449 * For extent tree v2 we use the block_group_item->chunk_offset to point at our f498cd59825cbf Josef Bacik 2021-12-15 2450 * global root id. For v1 it's always set to BTRFS_FIRST_CHUNK_TREE_OBJECTID. f498cd59825cbf Josef Bacik 2021-12-15 2451 */ f498cd59825cbf Josef Bacik 2021-12-15 2452 static u64 calculate_global_root_id(struct btrfs_fs_info *fs_info, u64 offset) f498cd59825cbf Josef Bacik 2021-12-15 2453 { f498cd59825cbf Josef Bacik 2021-12-15 2454 u64 div = SZ_1G; f498cd59825cbf Josef Bacik 2021-12-15 2455 f498cd59825cbf Josef Bacik 2021-12-15 2456 if (!btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) f498cd59825cbf Josef Bacik 2021-12-15 2457 return BTRFS_FIRST_CHUNK_TREE_OBJECTID; f498cd59825cbf Josef Bacik 2021-12-15 2458 f498cd59825cbf Josef Bacik 2021-12-15 2459 /* If we have a smaller fs index based on 128MiB. */ f498cd59825cbf Josef Bacik 2021-12-15 2460 if (btrfs_super_total_bytes(fs_info->super_copy) <= (SZ_1G * 10ULL)) f498cd59825cbf Josef Bacik 2021-12-15 2461 div = SZ_128M; f498cd59825cbf Josef Bacik 2021-12-15 2462 f498cd59825cbf Josef Bacik 2021-12-15 @2463 return (div_u64(offset, div) % fs_info->nr_global_roots); f498cd59825cbf Josef Bacik 2021-12-15 2464 } f498cd59825cbf Josef Bacik 2021-12-15 2465 :::::: The code at line 2463 was first introduced by commit :::::: f498cd59825cbf77b3e2dedc0ab6cf754a1049b4 btrfs: add support for multiple global roots :::::: TO: Josef Bacik <josef@xxxxxxxxxxxxxx> :::::: CC: David Sterba <dsterba@xxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx