SPLAY_INSERT
e = SPLAY_INSERT(iommu_page_tree, &ipm->ipm_tree, e);
e = SPLAY_INSERT(uturn_page_tree, &upm->upm_tree, e);
SPLAY_INSERT(phtree, &pp->pr_phtree, ph);
SPLAY_INSERT(kfsfileoptree, &kfsfileoptree, &dkf[i]);
if (SPLAY_INSERT(lfs_splay, &ip->i_lfs_lbtree, lbp) != NULL) {