[src/trunk]: src/sys/uvm uvm_fault: fix integer overflow so that MADV_SEQUENTIAL

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

details:   https://anonhg.NetBSD.org/src/rev/9d20db918292
branches:  trunk
changeset: 573756:9d20db918292
user:      yamt <yamt%NetBSD.org@localhost>
date:      Mon Feb 07 11:57:38 2005 +0000

description:
uvm_fault: fix integer overflow so that MADV_SEQUENTIAL
can work on large files.

diffstat:

 sys/uvm/uvm_fault.c |  11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

diffs (40 lines):

diff -r 5b3ddb068d1f -r 9d20db918292 sys/uvm/uvm_fault.c
--- a/sys/uvm/uvm_fault.c       Mon Feb 07 08:54:42 2005 +0000
+++ b/sys/uvm/uvm_fault.c       Mon Feb 07 11:57:38 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_fault.c,v 1.89 2005/01/01 09:14:49 yamt Exp $      */
+/*     $NetBSD: uvm_fault.c,v 1.90 2005/02/07 11:57:38 yamt Exp $      */
 
 /*
  *
@@ -39,7 +39,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_fault.c,v 1.89 2005/01/01 09:14:49 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_fault.c,v 1.90 2005/02/07 11:57:38 yamt Exp $");
 
 #include "opt_uvmhist.h"
 
@@ -561,7 +561,7 @@
        vm_prot_t enter_prot, check_prot;
        boolean_t wired, narrow, promote, locked, shadowed, wire_fault, cow_now;
        int npages, nback, nforw, centeridx, error, lcv, gotpages;
-       vaddr_t startva, objaddr, currva;
+       vaddr_t startva, currva;
        voff_t uoff;
        struct vm_amap *amap;
        struct uvm_object *uobj;
@@ -767,10 +767,9 @@
 
                /* flush object? */
                if (uobj) {
-                       objaddr =
-                           (startva - ufi.entry->start) + ufi.entry->offset;
+                       uoff = (startva - ufi.entry->start) + ufi.entry->offset;
                        simple_lock(&uobj->vmobjlock);
-                       (void) (uobj->pgops->pgo_put)(uobj, objaddr, objaddr +
+                       (void) (uobj->pgops->pgo_put)(uobj, uoff, uoff +
                                    (nback << PAGE_SHIFT), PGO_DEACTIVATE);
                }