Disabled due to https:/github.com/dynup/kpatch/issues/940
---
diff -Nupr src/fs/proc/array.c src/fs/proc/array.c
--- src/fs/proc/array.c	2020-03-11 11:23:26.874602392 +0000
+++ src/fs/proc/array.c	2020-03-11 11:48:34.514964309 +0000
@@ -370,12 +370,19 @@ static inline void task_seccomp(struct s
 	seq_putc(m, '\n');
 }
 
+#include <linux/livepatch.h>
 static inline void task_context_switch_counts(struct seq_file *m,
 						struct task_struct *p)
 {
+	int *newpid;
+
 	seq_put_decimal_ull(m, "voluntary_ctxt_switches:\t", p->nvcsw);
 	seq_put_decimal_ull(m, "\nnonvoluntary_ctxt_switches:\t", p->nivcsw);
 	seq_putc(m, '\n');
+
+	newpid = klp_shadow_get(p, 0);
+	if (newpid)
+		seq_printf(m, "newpid:\t%d\n", *newpid);
 }
 
 static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
diff -Nupr src/kernel/exit.c src/kernel/exit.c
--- src/kernel/exit.c	2020-03-11 11:23:30.434682812 +0000
+++ src/kernel/exit.c	2020-03-11 11:48:34.514964309 +0000
@@ -762,6 +762,7 @@ static void check_stack_usage(void)
 static inline void check_stack_usage(void) {}
 #endif
 
+#include <linux/livepatch.h>
 void __noreturn do_exit(long code)
 {
 	struct task_struct *tsk = current;
@@ -868,6 +869,8 @@ void __noreturn do_exit(long code)
 	exit_thread(tsk);
 	exit_umh(tsk);
 
+	klp_shadow_free(tsk, 0, NULL);
+
 	/*
 	 * Flush inherited counters to the parent - before the parent
 	 * gets woken up by child-exit notifications.
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 11:48:34.514964309 +0000
@@ -2210,6 +2210,7 @@ struct task_struct *fork_idle(int cpu)
  * It copies the process, and if successful kick-starts
  * it and waits for it to finish using the VM if required.
  */
+#include <linux/livepatch.h>
 long _do_fork(unsigned long clone_flags,
 	      unsigned long stack_start,
 	      unsigned long stack_size,
@@ -2222,6 +2223,8 @@ long _do_fork(unsigned long clone_flags,
 	struct task_struct *p;
 	int trace = 0;
 	long nr;
+	int *newpid;
+	static int ctr = 0;
 
 	/*
 	 * Determine whether and which event to report to ptracer.  When
@@ -2248,6 +2251,11 @@ long _do_fork(unsigned long clone_flags,
 	if (IS_ERR(p))
 		return PTR_ERR(p);
 
+	newpid = klp_shadow_get_or_alloc(p, 0, sizeof(*newpid), GFP_KERNEL,
+					 NULL, NULL);
+	if (newpid)
+		*newpid = ctr++;
+
 	/*
 	 * Do this prior waking up the new thread - the thread pointer
 	 * might get invalid after that point, if the thread exits quickly.