Messages in this thread Patch in this message | | | Date | Fri, 11 Jun 2010 18:21:48 +0900 | From | Kenji Kaneshige <> | Subject | [PATCH 4/4] x86: ioremap: fix normal ram range check |
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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 2010-06-10 07:28:33.146375380 +0900 +++ linux-2.6.34/arch/x86/mm/ioremap.c 2010-06-10 07:32:59.211196516 +0900 @@ -100,7 +100,7 @@ * 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)))
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