188 static int rebind_subsystems(struct cgroup_root *dst_root,
1218 static int rebind_subsystems(struct cgroup_root *dst_root, unsigned int ss_mask)  in rebind_subsystems()  argument
1235 		if (ss->root != &cgrp_dfl_root && dst_root != &cgrp_dfl_root)  in rebind_subsystems()
1241 	if (dst_root == &cgrp_dfl_root)  in rebind_subsystems()
1244 	ret = cgroup_populate_dir(&dst_root->cgrp, tmp_ss_mask);  in rebind_subsystems()
1246 		if (dst_root != &cgrp_dfl_root)  in rebind_subsystems()
1281 		WARN_ON(!css || cgroup_css(&dst_root->cgrp, ss));  in rebind_subsystems()
1284 		rcu_assign_pointer(dst_root->cgrp.subsys[ssid], css);  in rebind_subsystems()
1285 		ss->root = dst_root;  in rebind_subsystems()
1286 		css->cgroup = &dst_root->cgrp;  in rebind_subsystems()
1291 				       &dst_root->cgrp.e_csets[ss->id]);  in rebind_subsystems()
1299 		dst_root->subsys_mask |= 1 << ssid;  in rebind_subsystems()
1300 		if (dst_root != &cgrp_dfl_root) {  in rebind_subsystems()
1301 			dst_root->cgrp.subtree_control |= 1 << ssid;  in rebind_subsystems()
1302 			cgroup_refresh_child_subsys_mask(&dst_root->cgrp);  in rebind_subsystems()
1309 	kernfs_activate(dst_root->cgrp.kn);  in rebind_subsystems()