xen-blkback: fix foreach_grant_safe to handle empty lists
authorRoger Pau Monne <roger.pau@citrix.com>
Mon, 18 Mar 2013 16:49:33 +0000 (17:49 +0100)
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tue, 19 Mar 2013 12:53:15 +0000 (08:53 -0400)
We may use foreach_grant_safe in the future with empty lists, so make
sure we can handle them.

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

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