[src/netbsd-1-4]: src/sys/uvm patch from thorpej: fixes bug in mlock() of ano...

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

details:   https://anonhg.NetBSD.org/src/rev/40d4584a9f07
branches:  netbsd-1-4
changeset: 468721:40d4584a9f07
user:      perry <perry%NetBSD.org@localhost>
date:      Fri Jun 18 17:17:04 1999 +0000

description:
patch from thorpej: fixes bug in mlock() of anonymous memory

diffstat:

 sys/uvm/uvm_map.c |  13 ++++---------
 1 files changed, 4 insertions(+), 9 deletions(-)

diffs (27 lines):

diff -r ae114867658c -r 40d4584a9f07 sys/uvm/uvm_map.c
--- a/sys/uvm/uvm_map.c Fri Jun 18 17:14:35 1999 +0000
+++ b/sys/uvm/uvm_map.c Fri Jun 18 17:17:04 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_map.c,v 1.36.2.2 1999/06/18 17:01:53 perry Exp $   */
+/*     $NetBSD: uvm_map.c,v 1.36.2.3 1999/06/18 17:17:04 perry Exp $   */
 
 /* 
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -1981,14 +1981,9 @@
                         */
                        
                        if (!UVM_ET_ISSUBMAP(entry)) {  /* not submap */
-                               /*
-                                * XXXCDC: protection vs. max_protection??
-                                * (wirefault uses max?)
-                                * XXXCDC: used to do it always if
-                                * uvm_obj == NULL (wrong?)
-                                */
-                               if ( UVM_ET_ISNEEDSCOPY(entry) && 
-                                   (entry->protection & VM_PROT_WRITE) != 0) {
+                               if (UVM_ET_ISNEEDSCOPY(entry) &&
+                                   ((entry->protection & VM_PROT_WRITE) ||
+                                    (entry->object.uvm_obj == NULL))) {
                                        amap_copy(map, entry, M_WAITOK, TRUE,
                                            start, end); 
                                        /* XXXCDC: wait OK? */