From: Kenji Kaneshige Date: Fri, 18 Jun 2010 03:23:57 +0000 (+0900) Subject: x86, ioremap: Fix normal ram range check X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=35be1b716a475717611b2dc04185e9d80b9cb693;p=linux-beck.git 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 LKML-Reference: <4C1AE6CD.1080704@jp.fujitsu.com> Signed-off-by: H. Peter Anvin --- diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 754cb4cbce66..d41d3a9036ca 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)))