diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 5eb600d..359d307 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -135,6 +135,10 @@
 		}
 		if (ret < 0)
 			return ret;
+		/*
+		 * FIXME:Although we can add this cache, fat_cache_add() is
+		 * assuming to be called after linear search with fat_cache_id.
+		 */
 //		fat_cache_add(inode, new_fclus, new_dclus);
 	} else {
 		MSDOS_I(inode)->i_start = new_dclus;