From bdd3cee2e4b7279457139058615ced6c2b41e7de Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 28 Feb 2008 14:10:49 +0100
Subject: [PATCH] x86: ioremap(), extend check to all RAM pages
Suggested by Jan Beulich.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jan Beulich <jbeulich@novell.com>
---
arch/x86/mm/ioremap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 17f518839028..e5608d380176 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -146,8 +146,9 @@ static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size,
/*
* Don't allow anybody to remap normal RAM that we're using..
*/
- for (pfn = phys_addr >> PAGE_SHIFT; pfn < max_pfn_mapped &&
- (pfn << PAGE_SHIFT) < last_addr; pfn++) {
+ for (pfn = phys_addr >> PAGE_SHIFT;
+ (pfn << PAGE_SHIFT) < last_addr; pfn++) {
+
if (page_is_ram(pfn) && pfn_valid(pfn) &&
!PageReserved(pfn_to_page(pfn)))
return NULL;
--
2.50.1