Comment 1 for bug 1760099

@Breno the changes in this patch set touch some of the same areas of code:

  http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=33861&state=*

  [v3,5/5] rfi-flush: Call setup_rfi_flush() after LPM migration
  [v3,4/5] rfi-flush: Differentiate enabled and patched flush types
  [v3,3/5] rfi-flush: Always enable fallback flush on pseries
  [v3,2/5] rfi-flush: Make it possible to call setup_rfi_flush() again
  [v3,1/5] rfi-flush: Move the logic to avoid a redo into the debugfs code

Should we backport around those changes or are they also required?