[src/trunk]: src/sys/arch/sparc/sparc pv_unlink4m: correctly clear the PV_ANC...

[pk <pk%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/895707110338
branches:  trunk
changeset: 481408:895707110338
user:      pk <pk%NetBSD.org@localhost>
date:      Fri Jan 28 13:06:02 2000 +0000

description:
pv_unlink4m: correctly clear the PV_ANC flag. Noted by Artur Grabowski.

diffstat:

 sys/arch/sparc/sparc/pmap.c |  11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diffs (39 lines):

diff -r 213d69d8282e -r 895707110338 sys/arch/sparc/sparc/pmap.c
--- a/sys/arch/sparc/sparc/pmap.c       Fri Jan 28 11:30:22 2000 +0000
+++ b/sys/arch/sparc/sparc/pmap.c       Fri Jan 28 13:06:02 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.154 1999/11/17 06:16:49 chs Exp $ */
+/*     $NetBSD: pmap.c,v 1.155 2000/01/28 13:06:02 pk Exp $ */
 
 /*
  * Copyright (c) 1996
@@ -2534,7 +2534,8 @@
                if (npv != NULL) {
                        /*
                         * Shift next entry into the head.
-                        * Make sure to retain the REF, MOD and ANC flags.
+                        * Make sure to retain the REF, MOD and ANC flags
+                        * on the list head.
                         */
                        pv->pv_next = npv->pv_next;
                        pv->pv_pmap = npv->pv_pmap;
@@ -2544,8 +2545,8 @@
                        pool_put(&pv_pool, npv);
                } else {
                        /*
-                        * No mappings left; we still need to maintain
-                        * the REF and MOD flags. since pmap_is_modified()
+                        * No mappings left; we need to maintain
+                        * the REF and MOD flags, since pmap_is_modified()
                         * can still be called for this page.
                         */
                        pv->pv_pmap = NULL;
@@ -2574,7 +2575,7 @@
                        if (BADALIAS(va, npv->pv_va) ||
                            (npv->pv_flags & PV_C4M) == 0)
                                return;
-               pv->pv_flags &= PV_ANC;
+               pv->pv_flags &= ~PV_ANC;
                pv_changepte4m(pv, SRMMU_PG_C, 0);
        }
 }