5045 use atomic_{inc,dec}_* instead of atomic_add_*

*** 406,416 ****
          VN_HOLD(vp);
  
          /* add it to the handle hash */
          lhp->lh_next = ldi_handle_hash[index];
          ldi_handle_hash[index] = lhp;
!         atomic_add_long(&ldi_handle_hash_count, 1);
  
          LDI_ALLOCFREE((CE_WARN, "ldi handle alloc: new "
              "lh=0x%p, ident=0x%p, vp=0x%p, drv=%s, minor=0x%x",
              (void *)lhp, (void *)ident, (void *)vp,
              mod_major_to_name(getmajor(vp->v_rdev)),
--- 406,416 ----
          VN_HOLD(vp);
  
          /* add it to the handle hash */
          lhp->lh_next = ldi_handle_hash[index];
          ldi_handle_hash[index] = lhp;
!         atomic_inc_ulong(&ldi_handle_hash_count);
  
          LDI_ALLOCFREE((CE_WARN, "ldi handle alloc: new "
              "lh=0x%p, ident=0x%p, vp=0x%p, drv=%s, minor=0x%x",
              (void *)lhp, (void *)ident, (void *)vp,
              mod_major_to_name(getmajor(vp->v_rdev)),
*** 446,456 ****
  
          /* this was the last reference/open for this handle.  free it. */
          lhpp = handle_find_ref_nolock(lhp->lh_vp, lhp->lh_ident);
          ASSERT((lhpp != NULL) && (*lhpp != NULL));
          *lhpp = lhp->lh_next;
!         atomic_add_long(&ldi_handle_hash_count, -1);
          mutex_exit(&ldi_handle_hash_lock[index]);
  
          VN_RELE(lhp->lh_vp);
          ident_release(lhp->lh_ident);
  #ifdef  LDI_OBSOLETE_EVENT
--- 446,456 ----
  
          /* this was the last reference/open for this handle.  free it. */
          lhpp = handle_find_ref_nolock(lhp->lh_vp, lhp->lh_ident);
          ASSERT((lhpp != NULL) && (*lhpp != NULL));
          *lhpp = lhp->lh_next;
!         atomic_dec_ulong(&ldi_handle_hash_count);
          mutex_exit(&ldi_handle_hash_lock[index]);
  
          VN_RELE(lhp->lh_vp);
          ident_release(lhp->lh_ident);
  #ifdef  LDI_OBSOLETE_EVENT