title: functionality of local_fiq_enable()
body: <p>Came across the function <strong>local_fiq_enable()</strong> </p>
  
  <pre><code> #define local_fiq_enable()  __asm__("cpsie f    @ __stf" : : : "memory", "cc")
  </code></pre>
  
  <p>Couldn't understand what the <code>__asm__("cpsie f    @ __stf" : : : "memory", "cc")</code> does.</p>
  
  <p>All I could understand is enables [1st parameter - cpi<strong>e</strong>] something</p>