}
/* If nr exceeds the number of threads there is nothing todo */
- pos = NULL;
if (nr && nr >= get_nr_threads(leader))
- goto out;
+ goto fail;
/* It could be unhashed before we take rcu lock */
if (!pid_alive(leader))
- goto out;
+ goto fail;
/* If we haven't found our starting place yet start
* with the leader and walk nr threads forward.
*/
- for (pos = leader; nr > 0; --nr) {
- pos = next_thread(pos);
- if (pos == leader) {
- pos = NULL;
- goto out;
- }
- }
+ pos = leader;
+ do {
+ if (nr-- <= 0)
+ goto found;
+ } while_each_thread(leader, pos);
+fail:
+ pos = NULL;
+ goto out;
found:
get_task_struct(pos);
out: