title: Writing permessions for linux kernel module paramater
body: <p>I have a module i created in linux kernel.
  I want the module to receive parameters, and i want one of them to have reading and writing permissions.
  So i defined :</p>
  
  <pre><code>module_param(param, int, S_IWUSR|S_IRUGO); 
  </code></pre>
  
  <p>But for some reason when i go to /sys/module/mymodule/paramter/param and try to write to it does not give me permission (even using sudo)</p>