rv_remove
struct dentry *dir __free(rv_remove) = rv_create_dir(mon->name, root);
rv_remove(mon->root_d);
struct dentry *root_dir __free(rv_remove) = rv_create_dir("rv", NULL);
DEFINE_FREE(rv_remove, struct dentry *, if (_T) rv_remove(_T));
struct dentry *available __free(rv_remove) =
struct dentry *reacting __free(rv_remove) =