Merge branch 'work.thaw' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs thaw updates from Al Viro:
 "An ancient series that has fallen through the cracks in the previous
  cycle"

* 'work.thaw' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  buffer.c: call thaw_super during emergency thaw
  vfs: factor sb iteration out of do_emergency_remount