vdev_indirect_mark_obsolete
vdev_indirect_mark_obsolete(vd, offset, size);
vdev_indirect_mark_obsolete(vd, offset, size);
extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
vdev_indirect_mark_obsolete(vd, offset, size);
vdev_indirect_mark_obsolete(vd, synced_offset, synced_size);
vdev_indirect_mark_obsolete(vd, offset, size);