From: Li Dongyang <lidongyang@novell.com>
Date: Thu, 1 Sep 2011 10:39:08 +0000 (+0800)
Subject: xen-blkfront: add BLKIF_OP_DISCARD and discard request struct
X-Git-Tag: v3.2-rc1~48^2~3^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=32a8d26cc9b96629269e04ee6c583e14398f6f47;p=pandora-kernel.git

xen-blkfront: add BLKIF_OP_DISCARD and discard request struct

Now we use BLKIF_OP_DISCARD and add blkif_request_discard to blkif_request union,
the patch is taken from Owen Smith and Konrad, Thanks

Signed-off-by: Owen Smith <owen.smith@citrix.com>
Signed-off-by: Li Dongyang <lidongyang@novell.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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