VIRTIO_BLK_F_DISCARD
{ VIRTIO_BLK_F_DISCARD, "Discard" },
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, max_discard_sectors,
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, max_discard_seg, blkcfg);
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_DISCARD, discard_sector_alignment,
VIRTIO_BLK_F_DISCARD | \
if (virtio_with_feature(dev, VIRTIO_BLK_F_DISCARD)) {