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Commit bdd3cee2 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: ioremap(), extend check to all RAM pages 



Suggested by Jan Beulich.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Acked-by: default avatarJan Beulich <jbeulich@novell.com>
parent b089c12b

arch/x86/mm/ioremap.c

+3 −2
Original line number Original line Diff line number Diff line
@@ -146,8 +146,9 @@ static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size, 
	/*

	/*

	 * Don't allow anybody to remap normal RAM that we're using..

	 * Don't allow anybody to remap normal RAM that we're using..

	 */

	 */

	for (pfn = phys_addr >> PAGE_SHIFT; pfn < max_pfn_mapped &&

	for (pfn = phys_addr >> PAGE_SHIFT;

				(pfn << PAGE_SHIFT) < last_addr; pfn++) {

				(pfn << PAGE_SHIFT) < last_addr; pfn++) {



		if (page_is_ram(pfn) && pfn_valid(pfn) &&

		if (page_is_ram(pfn) && pfn_valid(pfn) &&

		    !PageReserved(pfn_to_page(pfn)))

		    !PageReserved(pfn_to_page(pfn)))

			return NULL;

			return NULL;