Btrfs: add inode item

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/TODO b/fs/btrfs/TODO
index 249e2e9..2ae4b3a 100644
--- a/fs/btrfs/TODO
+++ b/fs/btrfs/TODO
@@ -9,6 +9,7 @@
 * Add simple tree locking (semaphore per tree)
 * Make allocator smarter
 * Do actual block accounting
+* Check compat and incompat flags on the inode
 * Port into the kernel
 * Add virtual filesystems, mountable snapshots
 * Get rid of struct ctree_path, limiting tree levels held at one time