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Commit 35be1b71 authored by Kenji Kaneshige's avatar Kenji Kaneshige Committed by H. Peter Anvin
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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: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
LKML-Reference: <4C1AE6CD.1080704@jp.fujitsu.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent ffa71f33

arch/x86/mm/ioremap.c

+1 −1
Original line number Diff line number Diff line
@@ -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)))