tree 2a30eb9d4cea0a13587c7e4748d3584e070b35e1
parent f84adf4921ae3115502f44ff467b04bf2f88cf04
author Roger Pau Monne <roger.pau@citrix.com> 1360836729 +0100
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1361305041 -0500

xen-blkback: use balloon pages for persistent grants

With current persistent grants implementation we are not freeing the
persistent grants after we disconnect the device. Since grant map
operations change the mfn of the allocated page, and we can no longer
pass it to __free_page without setting the mfn to a sane value, use
balloon grant pages instead, as the gntdev device does.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: stable@vger.kernel.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>