Symbol: VIRTIO_BLK_T_DISCARD
sys/dev/pci/ld_virtio.c
1107
vr->vr_hdr.type = virtio_rw32(vsc, VIRTIO_BLK_T_DISCARD);
sys/dev/pci/ld_virtio.c
744
case VIRTIO_BLK_T_DISCARD: