grub-dev: Comments

 
 2.6 Comments
 ============
 
 All comments shall be C-style comments, of the form '/* ... */'.  A
 comment can be placed immediately preceding the entity it describes or
 it can be placed together with code, variable declarations, or other
 non-comment entities.  However, it is recommended to not mix various
 forms especially in types/structs descriptions.
 
    Acceptable:
      /* The page # that is the front buffer. */
      int displayed_page;
 
      int render_page; /* The page # that is the back buffer. */