VIRTIO_BLK_T_DISCARD 312 drivers/block/virtio_blk.c type = VIRTIO_BLK_T_DISCARD; VIRTIO_BLK_T_DISCARD 337 drivers/block/virtio_blk.c if (type == VIRTIO_BLK_T_DISCARD || type == VIRTIO_BLK_T_WRITE_ZEROES) {