diff --git a/ktrace-CO-RE/ktrace01_kern.c b/ktrace-CO-RE/ktrace01_kern.c
index 2b99c7a..4905b48 100644
--- a/ktrace-CO-RE/ktrace01_kern.c
+++ b/ktrace-CO-RE/ktrace01_kern.c
@@ -1,14 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
-//#include "vmlinux.h"
 
-//#include "kernel_headers.h"
 #include "vmlinux_local.h"
 
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-#include <bpf/bpf_core_read.h>
-
+#include <bpf/bpf_core_read.h> /* CO-RE */
 #include <bpf/bpf_tracing.h> /* BPF_KPROBE */
 
 #ifndef bpf_target_defined
@@ -26,29 +23,18 @@ struct my_struct G = {};
 
 SEC("kprobe/udp_send_skb")
 int BPF_KPROBE(udp_send_skb, struct sk_buff *skb)
-// int bpf_prog1(struct pt_regs *ctx, struct sk_buff *skb)
-//int bpf_prog1(struct sk_buff *ctx)
+//int udp_send_skb(struct pt_regs *ctx)
 {
-	// unsigned long rc = 0;
 	struct my_struct a;
-        int x = 42; //skb->hash;
+	int x = 42; //skb->hash;
 
-        BPF_CORE_READ_INTO(&x, skb, hash);
+	BPF_CORE_READ_INTO(&x, skb, hash);
 
 	G.v = 42;
 
 	a.v = bpf_get_prandom_u32() * x;
 
-	// bpf_override_return(ctx, rc);
 	if (a.v == 43)
 		return 0;
 	return G.v;
 }
-
-/*
-SEC("kprobe/tcp_v6_connect")
-int BPF_KPROBE(tcp_v6_connect, struct sock *sk)
-{
-	return trace_connect(sk);
-}
-*/