diff -Nupr src/kernel/fork.c src/kernel/fork.c
--- src/kernel/fork.c	2020-03-11 11:23:30.438682903 +0000
+++ src/kernel/fork.c	2020-03-11 11:41:01.567796732 +0000
@@ -1524,10 +1524,18 @@ static void posix_cpu_timers_init_group(
 static inline void posix_cpu_timers_init_group(struct signal_struct *sig) { }
 #endif
 
+void kpatch_foo(void)
+{
+	if (!jiffies)
+		printk("kpatch copy signal\n");
+}
+
 static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
 {
 	struct signal_struct *sig;
 
+	kpatch_foo();
+
 	if (clone_flags & CLONE_THREAD)
 		return 0;