From: Roger Pau Monne <roger.pau@citrix.com>
Date: Tue, 4 Dec 2012 14:21:52 +0000 (+0100)
Subject: xen-blkback: implement safe iterator for the list of persistent grants
X-Git-Tag: v3.8-rc7~11^2~3^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7dc341175af5e7361af81499ea192c7b274b6357;p=pandora-kernel.git

xen-blkback: implement safe iterator for the list of persistent grants

Change foreach_grant iterator to a safe version, that allows freeing
the element while iterating. Also move the free code in
free_persistent_gnts to prevent freeing the element before the rb_next
call.

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