title: searcing for the function calls submit_bio
body: <p>I am trying to intercept the submission of io requests in the <code>submit_bio</code> for a project I do in Linux.</p>
  
  <p>I want to find the main function that calls <code>submit_bio</code>, to submit blocks.</p>
  
  <p>I believe that there is a function that takes a page and submits the blocks in it.</p>
  
  <p>I am searching for such a function in Linux kernel that takes a page to submit and submits the blocks in it using <code>submit_bio</code>.</p>
  
  <p>Can anyone help me?</p>
  
  <p>Thanks</p>