diff --git a/kernel/sys.c b/kernel/sys.c
index ecd3ea12f72aa48d207ac9e02a251ade47bc3738..c0a58be780a407a5bf350e852db1c9800c98dd34 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1571,8 +1571,7 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
 			t = p;
 			do {
 				accumulate_thread_rusage(t, r);
-				t = next_thread(t);
-			} while (t != p);
+			} while_each_thread(p, t);
 			break;
 
 		default: