diff --git a/kernel/sys.c b/kernel/sys.c
index a81e190735f0..648b92b1321e 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1702,10 +1702,8 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
 		r->ru_oublock += sig->oublock;
 		if (maxrss < sig->maxrss)
 			maxrss = sig->maxrss;
-		t = p;
-		do {
+		__for_each_thread(sig, t)
 			accumulate_thread_rusage(t, r);
-		} while_each_thread(p, t);
 		break;
 
 	default: