title: What is the significance of THIS_MODULE in Linux kernel module drivers?
body: <p>In Linux device driver development, the <code>file_operations</code> structure uses <code>struct module *owner</code>. </p>
  
  <ul>
  <li>What is the use of this structure when we always initialize it with <code>THIS_MODULE</code>?</li>
  <li>When can this field be set to <code>NULL</code>?</li>
  </ul>