Add used_space_insert() and used_space_remove().
tree4685833ec6ece9a0d12c53e59ef86fcb8d4824ee
-rw-r--r-- 8221 Makefile
drwxr-xr-x - arch
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - genarch
drwxr-xr-x - generic
-rw-r--r-- 3612 kernel.config
drwxr-xr-x - test
drwxr-xr-x - tools