BLKIF_DISCARD_SECURE 1033 drivers/block/xen-blkback/blkback.c (req->u.discard.flag & BLKIF_DISCARD_SECURE)) ? BLKIF_DISCARD_SECURE 558 drivers/block/xen-blkfront.c ring_req->u.discard.flag = BLKIF_DISCARD_SECURE;