6151 use NULL setpagesize segop as a shorthand for ENOTSUP

*** 179,189 ****
  static int      segdev_getvp(struct seg *, caddr_t, struct vnode **);
  static int      segdev_advise(struct seg *, caddr_t, size_t, uint_t);
  static void     segdev_dump(struct seg *);
  static int      segdev_pagelock(struct seg *, caddr_t, size_t,
                      struct page ***, enum lock_type, enum seg_rw);
- static int      segdev_setpagesize(struct seg *, caddr_t, size_t, uint_t);
  static int      segdev_getmemid(struct seg *, caddr_t, memid_t *);
  
  /*
   * XXX  this struct is used by rootnex_map_fault to identify
   *      the segment it has been passed. So if you make it
--- 179,188 ----
*** 206,216 ****
          .gettype        = segdev_gettype,
          .getvp          = segdev_getvp,
          .advise         = segdev_advise,
          .dump           = segdev_dump,
          .pagelock       = segdev_pagelock,
-         .setpagesize    = segdev_setpagesize,
          .getmemid       = segdev_getmemid,
  };
  
  /*
   * Private segdev support routines
--- 205,214 ----
*** 2472,2489 ****
          TRACE_0(TR_FAC_DEVMAP, TR_DEVMAP_PAGELOCK,
              "segdev_pagelock:start");
          return (ENOTSUP);
  }
  
- /*ARGSUSED*/
- static int
- segdev_setpagesize(struct seg *seg, caddr_t addr, size_t len,
-     uint_t szc)
- {
-         return (ENOTSUP);
- }
- 
  /*
   * devmap_device: Used by devmap framework to establish mapping
   *                called by devmap_seup(9F) during map setup time.
   */
  /*ARGSUSED*/
--- 2470,2479 ----