diff --git a/kernel_module/dep.c b/kernel_module/dep.c
index 8e4d070..d2de568 100644
--- a/kernel_module/dep.c
+++ b/kernel_module/dep.c
@@ -57,7 +57,7 @@ static struct task_struct *kthread;
 static int work_func(void *data)
 {
 	while (!kthread_should_stop()) {
-		printk(KERN_INFO "%d\n", lkmc_dep);
+		pr_info("%d\n", lkmc_dep);
 		usleep_range(1000000, 1000001);
 	}
 	return 0;
diff --git a/kernel_module/kthread.c b/kernel_module/kthread.c
index 22a092f..fe0247b 100644
--- a/kernel_module/kthread.c
+++ b/kernel_module/kthread.c
@@ -22,7 +22,7 @@ static int work_func(void *data)
 {
 	int i = 0;
 	while (!kthread_should_stop()) {
-		printk(KERN_INFO "%d\n", i);
+		pr_info("%d\n", i);
 		usleep_range(1000000, 1000001);
 		i++;
 		if (i == 10)
diff --git a/kernel_module/kthreads.c b/kernel_module/kthreads.c
index 690b342..e480671 100644
--- a/kernel_module/kthreads.c
+++ b/kernel_module/kthreads.c
@@ -15,7 +15,7 @@ static int work_func1(void *data)
 {
 	int i = 0;
 	while (!kthread_should_stop()) {
-		printk(KERN_INFO "1 %d\n", i);
+		pr_info("1 %d\n", i);
 		usleep_range(1000000, 1000001);
 		i++;
 		if (i == 10)
@@ -28,7 +28,7 @@ static int work_func2(void *data)
 {
 	int i = 0;
 	while (!kthread_should_stop()) {
-		printk(KERN_INFO "2 %d\n", i);
+		pr_info("2 %d\n", i);
 		usleep_range(1000000, 1000001);
 		i++;
 		if (i == 10)
diff --git a/kernel_module/module_init.c b/kernel_module/module_init.c
index 0f880ad..9d932ca 100644
--- a/kernel_module/module_init.c
+++ b/kernel_module/module_init.c
@@ -17,11 +17,11 @@ MODULE_LICENSE("GPL");
 
 int init_module(void)
 {
-	printk(KERN_INFO "init_module\n");
+	pr_info("init_module\n");
 	return 0;
 }
 
 void cleanup_module(void)
 {
-	printk(KERN_INFO "cleanup_module\n");
+	pr_info("cleanup_module\n");
 }
diff --git a/kernel_module/panic.c b/kernel_module/panic.c
index a0f0ff9..c3ddef2 100644
--- a/kernel_module/panic.c
+++ b/kernel_module/panic.c
@@ -15,14 +15,14 @@ The alternative is to get the serial data out streamed to console or to a file:
 
 static int myinit(void)
 {
-	printk(KERN_INFO "panic init\n");
+	pr_info("panic init\n");
 	panic("hello panic");
 	return 0;
 }
 
 static void myexit(void)
 {
-	printk(KERN_INFO "panic cleanup\n");
+	pr_info("panic cleanup\n");
 }
 
 module_init(myinit)
diff --git a/kernel_module/sleep.c b/kernel_module/sleep.c
index 2fc2909..0925cd0 100644
--- a/kernel_module/sleep.c
+++ b/kernel_module/sleep.c
@@ -24,7 +24,7 @@ static void work_func(struct work_struct *work)
 {
 	int i = 0;
 	while (atomic_read(&run)) {
-		printk(KERN_INFO "%d\n", i);
+		pr_info("%d\n", i);
 		usleep_range(1000000, 1000001);
 		i++;
 		if (i == 10)
diff --git a/kernel_module/work_from_work.c b/kernel_module/work_from_work.c
index 017b9b2..d144e4c 100644
--- a/kernel_module/work_from_work.c
+++ b/kernel_module/work_from_work.c
@@ -18,7 +18,7 @@ DECLARE_WORK(work, work_func);
 
 static void work_func(struct work_struct *work)
 {
-	printk(KERN_INFO "%d\n", i);
+	pr_info("%d\n", i);
 	i++;
 	queue_delayed_work(queue, &next_work, HZ);
 }
diff --git a/kernel_module/workqueue_cheat.c b/kernel_module/workqueue_cheat.c
index ab6e32d..52aef8c 100644
--- a/kernel_module/workqueue_cheat.c
+++ b/kernel_module/workqueue_cheat.c
@@ -27,7 +27,7 @@ static struct workqueue_struct *queue;
 
 static void work_func(struct work_struct *work)
 {
-	printk(KERN_INFO "worker\n");
+	pr_info("worker\n");
 }
 
 DECLARE_WORK(work, work_func);