tree: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next head: 6c871f63986b34c7768080259ddf5991c55ee385 commit: 70978208ec91d798066f4c291bc98ff914bea222 [53/58] dm zoned: metadata version 2 config: nios2-allyesconfig (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 70978208ec91d798066f4c291bc98ff914bea222 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=nios2 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): drivers/md/dm-zoned-metadata.c: In function 'dmz_write_sb': >> drivers/md/dm-zoned-metadata.c:779:3: error: implicit declaration of function 'export_uuid' [-Werror=implicit-function-declaration] 779 | export_uuid(sb->dmz_uuid, &zmd->uuid); | ^~~~~~~~~~~ drivers/md/dm-zoned-metadata.c: In function 'dmz_check_sb': >> drivers/md/dm-zoned-metadata.c:1015:3: error: implicit declaration of function 'import_uuid' [-Werror=implicit-function-declaration] 1015 | import_uuid(&sb_uuid, sb->dmz_uuid); | ^~~~~~~~~~~ cc1: some warnings being treated as errors vim +/export_uuid +779 drivers/md/dm-zoned-metadata.c 761 762 /* 763 * Write super block of the specified metadata set. 764 */ 765 static int dmz_write_sb(struct dmz_metadata *zmd, unsigned int set) 766 { 767 struct dmz_mblock *mblk = zmd->sb[set].mblk; 768 struct dmz_super *sb = zmd->sb[set].sb; 769 struct dmz_dev *dev = zmd->sb[set].dev; 770 sector_t sb_block; 771 u64 sb_gen = zmd->sb_gen + 1; 772 int ret; 773 774 sb->magic = cpu_to_le32(DMZ_MAGIC); 775 776 sb->version = cpu_to_le32(zmd->sb_version); 777 if (zmd->sb_version > 1) { 778 BUILD_BUG_ON(UUID_SIZE != 16); > 779 export_uuid(sb->dmz_uuid, &zmd->uuid); 780 memcpy(sb->dmz_label, zmd->label, BDEVNAME_SIZE); 781 export_uuid(sb->dev_uuid, &dev->uuid); 782 } 783 784 sb->gen = cpu_to_le64(sb_gen); 785 786 /* 787 * The metadata always references the absolute block address, 788 * ie relative to the entire block range, not the per-device 789 * block address. 790 */ 791 sb_block = zmd->sb[set].zone->id << zmd->zone_nr_blocks_shift; 792 sb->sb_block = cpu_to_le64(sb_block); 793 sb->nr_meta_blocks = cpu_to_le32(zmd->nr_meta_blocks); 794 sb->nr_reserved_seq = cpu_to_le32(zmd->nr_reserved_seq); 795 sb->nr_chunks = cpu_to_le32(zmd->nr_chunks); 796 797 sb->nr_map_blocks = cpu_to_le32(zmd->nr_map_blocks); 798 sb->nr_bitmap_blocks = cpu_to_le32(zmd->nr_bitmap_blocks); 799 800 sb->crc = 0; 801 sb->crc = cpu_to_le32(crc32_le(sb_gen, (unsigned char *)sb, DMZ_BLOCK_SIZE)); 802 803 ret = dmz_rdwr_block(dev, REQ_OP_WRITE, zmd->sb[set].block, 804 mblk->page); 805 if (ret == 0) 806 ret = blkdev_issue_flush(dev->bdev, GFP_NOIO, NULL); 807 808 return ret; 809 } 810 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org