title: How to build uImage?
body: <p>I have zImage and kernel source. I did </p>
  
  <pre><code>make zImage 
  </code></pre>
  
  <p>to generate the zImage.<br>
  When I flash this, the board won't boot up.<br>
  So how do I convert this to uImage which u-boot reads properly?<br>
  Thanks! </p>