HelenOS sources

REQ_BUFFER_DESC   211 uspace/drv/block/virtio-blk/virtio-blk.c 	    VIRTQ_DESC_F_NEXT, REQ_BUFFER_DESC(descno));
REQ_BUFFER_DESC   212 uspace/drv/block/virtio-blk/virtio-blk.c 	virtio_virtq_desc_set(vdev, RQ_QUEUE, REQ_BUFFER_DESC(descno),