On Thu, Oct 10, 2019 at 10:39:28AM +0800, Qu Wenruo wrote:
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index b65c7ee75bc7..1d1e50c42d0e 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -48,6 +48,9 @@
/* tracks free space in block groups. */
#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
+/* sotre BLOCK_GROUP_ITEMs in a seprate tree */
+#define BTRFS_BLOCK_GROUP_TREE_OBJECTID 11ULL
+
nit: "store" and "separate"?
/* device stats in the device tree */
#define BTRFS_DEV_STATS_OBJECTID 0ULL
--
2.23.0
