diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 83a6a931af09b96ad998a797378a9d43b7da6ba7..8627b7f26a60f1567d51f461257213b146f3a59a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1181,8 +1181,10 @@ struct btrfs_root {
 
 	u64 highest_objectid;
 
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 	/* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
 	u64 alloc_bytenr;
+#endif
 
 	u64 defrag_trans_start;
 	struct btrfs_key defrag_progress;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 3bb9607edc5d9a63630e2a93b783de08955b29da..81d83300c99b4d93a3a8b358a34e2b8a687d5c58 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8354,6 +8354,7 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 	bool skinny_metadata = btrfs_fs_incompat(root->fs_info,
 						 SKINNY_METADATA);
 
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 	if (btrfs_test_is_dummy_root(root)) {
 		buf = btrfs_init_new_buffer(trans, root, root->alloc_bytenr,
 					    level);
@@ -8361,6 +8362,7 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 			root->alloc_bytenr += blocksize;
 		return buf;
 	}
+#endif
 
 	block_rsv = use_block_rsv(trans, root, blocksize);
 	if (IS_ERR(block_rsv))