diff --git a/4.14.8/examples/chardev.c b/4.14.8/examples/chardev.c
index 36580c4..98bfd87 100644
--- a/4.14.8/examples/chardev.c
+++ b/4.14.8/examples/chardev.c
@@ -16,6 +16,8 @@
 #include <linux/poll.h>
 #include <linux/cdev.h>
 
+MODULE_LICENSE("GPL");
+
 /*
  *  Prototypes - this would normally go in a .h file
  */
diff --git a/4.14.8/examples/chardev2.c b/4.14.8/examples/chardev2.c
index 55917e4..cc5bff9 100644
--- a/4.14.8/examples/chardev2.c
+++ b/4.14.8/examples/chardev2.c
@@ -15,6 +15,8 @@
 #include <linux/poll.h>
 #include <linux/cdev.h>
 
+MODULE_LICENSE("GPL");
+
 #include "chardev.h"
 #define SUCCESS 0
 #define DEVICE_NAME "char_dev"
diff --git a/4.14.8/examples/syscall.c b/4.14.8/examples/syscall.c
index 16222c5..ccb901c 100644
--- a/4.14.8/examples/syscall.c
+++ b/4.14.8/examples/syscall.c
@@ -25,7 +25,7 @@
 #include <linux/sched.h>
 #include <linux/uaccess.h>
 
-unsigned long **sys_call_table;
+sys_call_ptr_t *sys_call_table_ptr;
 unsigned long original_cr0;
 
 /*
@@ -87,15 +87,18 @@ asmlinkage int our_sys_open(const char *filename, int flags, int mode)
     return original_call(filename, flags, mode);
 }
 
-static unsigned long **aquire_sys_call_table(void)
+static sys_call_ptr_t *aquire_sys_call_table(void)
 {
     unsigned long int offset = PAGE_OFFSET;
-    unsigned long **sct;
+    /* unsigned long **sct; */
+    sys_call_ptr_t *sct;
 
     while (offset < ULLONG_MAX) {
-        sct = (unsigned long **)offset;
+        /* sct = (unsigned long **)offset; */
+        sct = (sys_call_ptr_t *)offset;
 
-        if (sct[__NR_close] == (unsigned long *) sys_close)
+        /* if (sct[__NR_close] == (unsigned long *) sys_close) */
+        if (sct[__NR_close] == (sys_call_ptr_t) sys_close)
             return sct;
 
         offset += sizeof(void *);
@@ -106,7 +109,7 @@ static unsigned long **aquire_sys_call_table(void)
 
 static int __init syscall_start(void)
 {
-    if(!(sys_call_table = aquire_sys_call_table()))
+    if(!(sys_call_table_ptr = aquire_sys_call_table()))
         return -1;
 
     original_cr0 = read_cr0();
@@ -114,10 +117,10 @@ static int __init syscall_start(void)
     write_cr0(original_cr0 & ~0x00010000);
 
     /* keep track of the original open function */
-    original_call = (void*)sys_call_table[__NR_open];
+    original_call = (void*)sys_call_table_ptr[__NR_open];
 
     /* use our open function instead */
-    sys_call_table[__NR_open] = (unsigned long *)our_sys_open;
+    sys_call_table_ptr[__NR_open] = (sys_call_ptr_t)our_sys_open;
 
     write_cr0(original_cr0);
 
@@ -128,14 +131,14 @@ static int __init syscall_start(void)
 
 static void __exit syscall_end(void)
 {
-    if(!sys_call_table) {
+    if(!sys_call_table_ptr) {
         return;
     }
 
     /*
      * Return the system call back to normal
      */
-    if (sys_call_table[__NR_open] != (unsigned long *)our_sys_open) {
+    if (sys_call_table_ptr[__NR_open] != (sys_call_ptr_t) our_sys_open) {
         pr_alert("Somebody else also played with the ");
         pr_alert("open system call\n");
         pr_alert("The system may be left in ");
@@ -143,7 +146,7 @@ static void __exit syscall_end(void)
     }
 
     write_cr0(original_cr0 & ~0x00010000);
-    sys_call_table[__NR_open] = (unsigned long *)original_call;
+    sys_call_table_ptr[__NR_open] = (sys_call_ptr_t)original_call;
     write_cr0(original_cr0);
 
     msleep(2000);