3741 zfs needs better comments
Submitted by:   Will Andrews <willa@spectralogic.com>
Submitted by:   Justin Gibbs <justing@spectralogic.com>
Submitted by:   Alan Somers <alans@spectralogic.com>
Reviewed by:    Matthew Ahrens <mahrens@delphix.com>

*** 1822,1832 ****
  }
  
  void
  dmu_fini(void)
  {
!         arc_fini();
          l2arc_fini();
          zfetch_fini();
          dbuf_fini();
          dnode_fini();
          dmu_objset_fini();
--- 1822,1832 ----
  }
  
  void
  dmu_fini(void)
  {
!         arc_fini(); /* arc depends on l2arc, so arc must go first */
          l2arc_fini();
          zfetch_fini();
          dbuf_fini();
          dnode_fini();
          dmu_objset_fini();