!(user = find_user(who)))
                                goto out_unlock;        /* No processes for this user */
 
-                       do_each_thread(g, p)
+                       do_each_thread(g, p) {
                                if (__task_cred(p)->uid == who)
                                        error = set_one_prio(p, niceval, error);
-                       while_each_thread(g, p);
+                       } while_each_thread(g, p);
                        if (who != cred->uid)
                                free_uid(user);         /* For find_user() */
                        break;
                                 !(user = find_user(who)))
                                goto out_unlock;        /* No processes for this user */
 
-                       do_each_thread(g, p)
+                       do_each_thread(g, p) {
                                if (__task_cred(p)->uid == who) {
                                        niceval = 20 - task_nice(p);
                                        if (niceval > retval)
                                                retval = niceval;
                                }
-                       while_each_thread(g, p);
+                       } while_each_thread(g, p);
                        if (who != cred->uid)
                                free_uid(user);         /* for find_user() */
                        break;