dnode_sync_free_range(dn, rp->fr_blkid, rp->fr_nblks, tx);
/* grab the mutex so we don't race with dnode_block_freed() */
mutex_enter(&dn->dn_mtx);
dnode_sync_free_range(dn, rp->fr_blkid, rp->fr_nblks, tx);
/* grab the mutex so we don't race with dnode_block_freed() */
mutex_enter(&dn->dn_mtx);