panic: pmap_remove_pv: not on list

[Tsubai Masanari <tsubai%iri.co.jp@localhost>]

I sometimes get:

panic: pmap_remove_pv: not on list

on PowerMac (and perhaps other powerpc ports, too).  The following patch
seems to fix the problem.  Is this a correct fix?

*** pmap.c.orig Tue Jan 13 22:52:23 1998
--- pmap.c      Mon Apr 27 06:32:47 1998
***************
*** 1280,1285 ****
--- 1280,1286 ----
                                asm volatile ("sync");
                                tlbie(va);
                                tlbsync();
+                               goto next;
                        }
                for (ptp = ptable + (idx ^ ptab_mask) * 8, i = 8; --i >= 0; 
ptp++)
                        if ((ptp->pte_hi & PTE_VALID)
***************
*** 1289,1294 ****
--- 1290,1296 ----
                                asm volatile ("sync");
                                tlbie(va);
                                tlbsync();
+                               goto next;
                        }
                for (po = potable[idx].lh_first; po; po = npo) {
                        npo = po->po_list.le_next;
***************
*** 1296,1303 ****
--- 1298,1307 ----
                                pmap_remove_pv(idx, va, pind, &po->po_pte);
                                LIST_REMOVE(po, po_list);
                                pofree(po, 1);
+                               goto next;
                        }
                }
+ next:
        }
        splx(s);
  }