ufs_lockfs_begin_getpage
error = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, segkmap, 0, &protp);
error = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, segkmap, !iswrite,
err = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, seg,
extern int ufs_lockfs_begin_getpage(struct ufsvfs *, struct ulockfs **,