>From 67c99f8b59a3fa8a098967237ec1687b91632f63 Mon Sep 17 00:00:00 2001
From: HATAYAMA Daisuke <d.hatayama@xxxxxxxxxxxxxx>
Date: Thu, 28 Apr 2011 07:59:51 +0900
Subject: [PATCH 5/5] ia64: Add _PAGE_PROTNONE check
The variable page_present in ia64_translate_pte() has type int with
4-byte length and _PAGE_PROTNONE bit on ia64 is 63. (!!) operation is
added in order to deal with overflow.
---
ia64.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/ia64.c b/ia64.c
index 9f8c06d..5b1f99e 100755
--- a/ia64.c
+++ b/ia64.c
@@ -893,7 +893,7 @@ ia64_vtop_4l(ulong vaddr, physaddr_t *paddr, ulong *pgd, int verbose, int usr)
if (verbose)
fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte);
- if (!(pte & (_PAGE_P))) {
+ if (!(pte & (_PAGE_P | _PAGE_PROTNONE))) {
if (usr)
*paddr = pte;
if (pte && verbose) {
@@ -971,7 +971,7 @@ ia64_vtop(ulong vaddr, physaddr_t *paddr, ulong *pgd, int verbose, int usr)
if (verbose)
fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte);
- if (!(pte & (_PAGE_P))) {
+ if (!(pte & (_PAGE_P | _PAGE_PROTNONE))) {
if (usr)
*paddr = pte;
if (pte && verbose) {
@@ -1237,7 +1237,7 @@ ia64_translate_pte(ulong pte, void *physaddr, ulonglong unused)
ulong paddr;
paddr = pte & _PFN_MASK;
- page_present = pte & _PAGE_P;
+ page_present = !!(pte & (_PAGE_P | _PAGE_PROTNONE));
if (physaddr) {
*((ulong *)physaddr) = paddr;
--
1.7.4.4
--
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