tree: https://github.com/kdave/btrfs-devel.git dev/auth-hash head: 15a34ffb02a72d9a272bbeaf80c2eea4cf4e3754 commit: 15a34ffb02a72d9a272bbeaf80c2eea4cf4e3754 [59/59] btrfs: add authenticated plus secondary checksum for sha256 and blake2b config: arm64-randconfig-r003-20200623 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 1d4c87335d5236ea1f35937e1014980ba961ae34) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu git checkout 15a34ffb02a72d9a272bbeaf80c2eea4cf4e3754 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from fs/btrfs/ctree.c:10: fs/btrfs/ctree.h:2276:8: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers] size_t __const btrfs_get_num_csums(void); ^~~~~~~~ BTRFS_CSUM_TYPE_AUTH_CSUM }, ^~~~~~~~~~~~~~~~~~~~~~~~~ BTRFS_CSUM_TYPE_AUTHSUM fs/btrfs/ctree.h:2268:2: note: 'BTRFS_CSUM_TYPE_AUTHSUM' declared here BTRFS_CSUM_TYPE_AUTHSUM = 2, ^ fs/btrfs/ctree.c:56:10: error: use of undeclared identifier 'BTRFS_CSUM_TYPE_AUTH_CSUM'; did you mean 'BTRFS_CSUM_TYPE_AUTHSUM'? BTRFS_CSUM_TYPE_AUTH_CSUM }, ^~~~~~~~~~~~~~~~~~~~~~~~~ BTRFS_CSUM_TYPE_AUTHSUM fs/btrfs/ctree.h:2268:2: note: 'BTRFS_CSUM_TYPE_AUTHSUM' declared here BTRFS_CSUM_TYPE_AUTHSUM = 2, ^ fs/btrfs/ctree.c:93:8: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers] size_t __const btrfs_get_num_csums(void) ^~~~~~~~ 2 warnings and 2 errors generated. vim +52 fs/btrfs/ctree.c 11 #include "disk-io.h" 12 #include "transaction.h" 13 #include "print-tree.h" 14 #include "locking.h" 15 #include "volumes.h" 16 #include "qgroup.h" 17 18 static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root 19 *root, struct btrfs_path *path, int level); 20 static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root, 21 const struct btrfs_key *ins_key, struct btrfs_path *path, 22 int data_size, int extend); 23 static int push_node_left(struct btrfs_trans_handle *trans, 24 struct extent_buffer *dst, 25 struct extent_buffer *src, int empty); 26 static int balance_node_right(struct btrfs_trans_handle *trans, 27 struct extent_buffer *dst_buf, 28 struct extent_buffer *src_buf); 29 static void del_ptr(struct btrfs_root *root, struct btrfs_path *path, 30 int level, int slot); 31 32 static const struct btrfs_csums { 33 u8 size; 34 u8 flags; 35 const char name[16]; 36 const char driver[14]; 37 } btrfs_csums[] = { 38 [BTRFS_CSUM_TYPE_CRC32] = { .size = 4, .name = "crc32c" }, 39 [BTRFS_CSUM_TYPE_XXHASH] = { .size = 8, .name = "xxhash64" }, 40 [BTRFS_CSUM_TYPE_SHA256] = { .size = 32, .name = "sha256" }, 41 [BTRFS_CSUM_TYPE_BLAKE2] = { .size = 32, .name = "blake2b", 42 .driver = "blake2b-256" }, 43 [BTRFS_CSUM_TYPE_AUTH_SHA256] = { .size = 32, .name = "auth-sha256", 44 .driver = "hmac(sha256)", 45 .flags = BTRFS_CSUM_TYPE_AUTH }, 46 [BTRFS_CSUM_TYPE_AUTH_BLAKE2] = { .size = 32, .name = "auth-blake2b", 47 .driver = "blake2b-256", 48 .flags = BTRFS_CSUM_TYPE_AUTH }, 49 [BTRFS_CSUM_TYPE_AUTHSUM_SHA256] = { .size = 32, .name = "authsum-sha256", 50 .driver = "hmac(sha256)", 51 .flags = BTRFS_CSUM_TYPE_AUTH | 53 [BTRFS_CSUM_TYPE_AUTHSUM_BLAKE2] = { .size = 32, .name = "authsum-blake2b", 54 .driver = "blake2b-256", 55 .flags = BTRFS_CSUM_TYPE_AUTH | 56 BTRFS_CSUM_TYPE_AUTH_CSUM }, 57 }; 58 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org