Marked crash line on archx64.

20160425/chardev-1write.c

@@ -193,11 +193,11 @@ device_write(struct file *filp, const char *buff, size_t len, loff_t * off)
         else {
 		int i;
 		for(i = 0; i < len; i++) //Save the given string
-			msg_username[i] = buff[i];
+			msg_username[i] = buff[i]; //Heres the CRASH
 		for(i = len; i < USERBUF_LEN; i++) //Zeroing the rest of mem
 			msg_username[i] = 0;
-		//printk(KERN_INFO "%s: Successfully got %d bytes!\n",
-		//       DEVICE_NAME, (int)len);
+		printk(KERN_INFO "%s: Successfully got %d bytes!\n",
+		       DEVICE_NAME, (int)len);
 		if(msg_username[len-1] == '\n') //Got new line terminator ?
 		  msg_username[len-1] = 0; //Then terminate it!
 		return len; //Emit successfully stored len bytes