Add ext2 superblock, document file system
diff --git a/src/kernel/dri/fs/ext2/Jmk b/src/kernel/dri/fs/ext2/Jmk
index b0da0c3..aac4c5c 100644
--- a/src/kernel/dri/fs/ext2/Jmk
+++ b/src/kernel/dri/fs/ext2/Jmk
@@ -8,7 +8,7 @@
 
 archetype(c)
 
-CFLAGS += -I/include/kernel
+CFLAGS += -I$(ROOT)/include/kernel
 
 OBJECTS = ext2.o