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@jp.fujitsu.com>
LKML-Reference: <4C1AE6CD.1080704@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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 @@
* 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)))
