[src/trunk]: src/sys/arch/ia64/ia64 Fix a possible infinite loop in pmap_krem...

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

details:   https://anonhg.NetBSD.org/src/rev/5ecdcff7f076
branches:  trunk
changeset: 822826:5ecdcff7f076
user:      scole <scole%NetBSD.org@localhost>
date:      Sat Apr 08 20:59:27 2017 +0000

description:
Fix a possible infinite loop in pmap_kremove()

diffstat:

 sys/arch/ia64/ia64/pmap.c |  10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diffs (41 lines):

diff -r 592cf78f2eb9 -r 5ecdcff7f076 sys/arch/ia64/ia64/pmap.c
--- a/sys/arch/ia64/ia64/pmap.c Sat Apr 08 19:53:54 2017 +0000
+++ b/sys/arch/ia64/ia64/pmap.c Sat Apr 08 20:59:27 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.35 2017/04/08 18:08:33 scole Exp $ */
+/* $NetBSD: pmap.c,v 1.36 2017/04/08 20:59:27 scole Exp $ */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
@@ -81,7 +81,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.35 2017/04/08 18:08:33 scole Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.36 2017/04/08 20:59:27 scole Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -2110,11 +2110,12 @@
 pmap_kremove(vaddr_t va, vsize_t size)
 {
        struct ia64_lpte *pte;
-
+       vaddr_t eva = va + size;
+       
        UVMHIST_FUNC(__func__); UVMHIST_CALLED(maphist);
        UVMHIST_LOG(maphist, "(va=%#lx)", va, 0, 0, 0);
 
-       while (size > 0) {
+       while (va < eva) {
                pte = pmap_find_kpte(va);
                if (pmap_present(pte)) {
                        KASSERT(pmap_managed(pte) != 0);
@@ -2123,7 +2124,6 @@
                        pmap_clear_present(pte);
                }
                va += PAGE_SIZE;
-               size -= PAGE_SIZE;
        }
 }