title: How to Enable or configure ftrace module
body: <p>i'd like to use the advanced features of ftrace but i dit not figure out how. debugfs is mounted but there is no "tracing"-folder in /sys/kernel/debug. 
  i am running a ARM-Target @ Angstrom distro build via yocto, please see :</p>
  
  <p><a href="https://i.stack.imgur.com/9wwJj.png" rel="nofollow noreferrer">Image: uname -a &amp; lsb_release -a output</a></p>
  
  <p><a href="https://i.stack.imgur.com/UFmGS.png" rel="nofollow noreferrer">zcat /proc/config.gz | grep TRACER|FTRACE output</a></p>
  
  <p>How to configure the kernel ? which options i have to set?</p>