+ goto finish;
+ }
+ }
+
+ for (;;) {
+ MountPoint p;
+ char *controller, *where, *options;
+ char ***k = NULL;
+
+ controller = set_steal_first(controllers);
+ if (!controller)
+ break;
+
+ if (join_controllers)
+ for (k = join_controllers; *k; k++)
+ if (strv_find(*k, controller))
+ break;
+
+ if (k && *k) {
+ char **i, **j;
+
+ for (i = *k, j = *k; *i; i++) {
+
+ if (!streq(*i, controller)) {
+ char *t;
+
+ t = set_remove(controllers, *i);
+ if (!t) {
+ free(*i);
+ continue;
+ }
+ free(t);
+ }
+
+ *(j++) = *i;
+ }
+
+ *j = NULL;
+
+ options = strv_join(*k, ",");
+ if (!options) {
+ log_error("Failed to join options");
+ free(controller);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ } else {
+ options = controller;
+ controller = NULL;
+ }
+
+ where = strappend("/sys/fs/cgroup/", options);
+ if (!where) {
+ log_error("Failed to build path");
+ free(options);