tree: https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git nvdimm-meta head: 722ffe14d3ec1009a9245b0f0ba49805643d92bb commit: 20a01bce9e4b922773f6943d8f41cadef6673ffc [11/16] bcache: support storing bcache journal into NVDIMM meta device config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 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/c... git remote add bcache https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git git fetch --no-tags bcache nvdimm-meta git checkout 20a01bce9e4b922773f6943d8f41cadef6673ffc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): In file included from drivers/md/bcache/nvm-pages.h:6, from drivers/md/bcache/super.c:17: include/uapi/linux/bcache-nvm.h:110:3: error: #error "Non-64bit platform is not supported" 110 | #error "Non-64bit platform is not supported" | ^~~~~ drivers/md/bcache/super.c: In function 'cache_set_free': 1705 | (void *)(ca->sb.d[i] + offset), len); | ^ In file included from drivers/md/bcache/nvm-pages.h:6, from drivers/md/bcache/super.c:17: At top level: include/uapi/linux/bcache-nvm.h:105:28: warning: 'bch_nvm_pages_pgalloc_magic' defined but not used [-Wunused-const-variable=] 105 | static const unsigned char bch_nvm_pages_pgalloc_magic[] = { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/uapi/linux/bcache-nvm.h:102:28: warning: 'bch_nvm_pages_magic' defined but not used [-Wunused-const-variable=] 102 | static const unsigned char bch_nvm_pages_magic[] = { | ^~~~~~~~~~~~~~~~~~~ vim +1705 drivers/md/bcache/super.c 1685 1686 static void cache_set_free(struct closure *cl) 1687 { 1688 struct cache_set *c = container_of(cl, struct cache_set, cl); 1689 struct cache *ca = c->cache; 1690 1691 #ifdef CONFIG_BCACHE_NVM_PAGES 1692 /* Flush cache if journal stored in NVDIMM */ 1693 if (ca && bch_has_feature_nvdimm_meta(&ca->sb)) { 1694 unsigned long bucket_size = ca->sb.bucket_size; 1695 int i; 1696 1697 for (i = 0; i < ca->sb.keys; i++) { 1698 unsigned long offset = 0; 1699 unsigned int len = round_down(UINT_MAX, 2); 1700 1701 while (bucket_size > 0) { 1702 if (len > bucket_size) 1703 len = bucket_size; 1704 arch_invalidate_pmem( 1706 offset += len; 1707 bucket_size -= len; 1708 } 1709 } 1710 } 1711 #endif /* CONFIG_BCACHE_NVM_PAGES */ 1712 1713 debugfs_remove(c->debug); 1714 1715 bch_open_buckets_free(c); 1716 bch_btree_cache_free(c); 1717 bch_journal_free(c); 1718 1719 mutex_lock(&bch_register_lock); 1720 bch_bset_sort_state_free(&c->sort); 1721 free_pages((unsigned long) c->uuids, ilog2(meta_bucket_pages(&c->cache->sb))); 1722 1723 if (ca) { 1724 ca->set = NULL; 1725 c->cache = NULL; 1726 kobject_put(&ca->kobj); 1727 } 1728 1729 1730 if (c->moving_gc_wq) 1731 destroy_workqueue(c->moving_gc_wq); 1732 bioset_exit(&c->bio_split); 1733 mempool_exit(&c->fill_iter); 1734 mempool_exit(&c->bio_meta); 1735 mempool_exit(&c->search); 1736 kfree(c->devices); 1737 1738 list_del(&c->list); 1739 mutex_unlock(&bch_register_lock); 1740 1741 pr_info("Cache set %pU unregistered\n", c->set_uuid); 1742 wake_up(&unregister_wait); 1743 1744 closure_debug_destroy(&c->cl); 1745 kobject_put(&c->kobj); 1746 } 1747 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org