[PATCH 2/2] x86: ioremap: fix normal ram range check

Kenji Kaneshige
2010-06-17T01:31:56Z

Check for norma 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@jp.fujitsu.com>

---
arch/x86/mm/ioremap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.34/arch/x86/mm/ioremap.c
===================================================================
--- linux-2.6.34.orig/arch/x86/mm/ioremap.c 2010-06-15 05:33:06.272381451 +0900
+++ linux-2.6.34/arch/x86/mm/ioremap.c 2010-06-15 05:33:21.086585690 +0900
@@ -101,7 +101,7 @@
* 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)))