linux-kernel - [tip:x86/mm] x86, ioremap: Fix normal ram range check

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Message-ID: <tip-35be1b716a475717611b2dc04185e9d80b9cb693@git.kernel.org>
Date:	Fri, 9 Jul 2010 19:19:00 GMT
From:	tip-bot for Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	kaneshige.kenji@...fujitsu.com, tglx@...utronix.de,
	hpa@...ux.intel.com
Subject: [tip:x86/mm] x86, ioremap: Fix normal ram range check

Commit-ID:  35be1b716a475717611b2dc04185e9d80b9cb693
Gitweb:     http://git.kernel.org/tip/35be1b716a475717611b2dc04185e9d80b9cb693
Author:     Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
AuthorDate: Fri, 18 Jun 2010 12:23:57 +0900
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Fri, 9 Jul 2010 11:42:11 -0700

x86, ioremap: Fix normal ram range check

Check for normal RAM in x86 ioremap() code seems to not work for the
last page frame in the specified physical address range.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
LKML-Reference: <4C1AE6CD.1080704@...fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/mm/ioremap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 754cb4c..d41d3a9 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -101,7 +101,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
 	 * Don't allow anybody to remap normal RAM that we're using..
 	 */
 	last_pfn = last_addr >> PAGE_SHIFT;
-	for (pfn = phys_addr >> PAGE_SHIFT; pfn < last_pfn; pfn++) {
+	for (pfn = phys_addr >> PAGE_SHIFT; pfn <= last_pfn; pfn++) {
 		int is_ram = page_is_ram(pfn);
 
 		if (is_ram && pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))
--
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