[src/trunk]: src/sys/uvm A page fault on a non-pageable map is always fatal.

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

details:   https://anonhg.NetBSD.org/src/rev/e74ff9f63328
branches:  trunk
changeset: 473425:e74ff9f63328
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Wed Jun 02 23:26:21 1999 +0000

description:
A page fault on a non-pageable map is always fatal.

diffstat:

 sys/uvm/uvm_fault.c |  13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diffs (27 lines):

diff -r 4c0df5d58fa9 -r e74ff9f63328 sys/uvm/uvm_fault.c
--- a/sys/uvm/uvm_fault.c       Wed Jun 02 23:24:54 1999 +0000
+++ b/sys/uvm/uvm_fault.c       Wed Jun 02 23:26:21 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_fault.c,v 1.31 1999/05/28 20:49:51 thorpej Exp $   */
+/*     $NetBSD: uvm_fault.c,v 1.32 1999/06/02 23:26:21 thorpej Exp $   */
 
 /*
  *
@@ -616,6 +616,17 @@
        }
 
        /*
+        * if the map is not a pageable map, a page fault always fails.
+        */
+
+       if ((ufi.map->flags & VM_MAP_PAGEABLE) == 0) {
+               UVMHIST_LOG(maphist,
+                   "<- map %p not pageable", ufi.map, 0, 0, 0);
+               uvmfault_unlockmaps(&ufi, FALSE);
+               return (KERN_FAILURE);
+       }
+
+       /*
         * "enter_prot" is the protection we want to enter the page in at.
         * for certain pages (e.g. copy-on-write pages) this protection can
         * be more strict than ufi.entry->protection.  "wired" means either