diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 046c160..35eebd5 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2104,7 +2104,7 @@
 	down_read(&cgrp->pids_mutex);
 	if (pid) {
 		int end = cgrp->pids_length;
-		int i;
+
 		while (index < end) {
 			int mid = (index + end) / 2;
 			if (cgrp->tasks_pids[mid] == pid) {