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

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Suggested by Jan Beulich.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jan Beulich <jbeulich@novell.com>
This commit is contained in:
Ingo Molnar 2008-02-28 14:10:49 +01:00
parent b089c12b25
commit bdd3cee2e4
1 changed files with 3 additions and 2 deletions
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5
arch/x86/mm/ioremap.c
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@ -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..
*/
for (pfn = phys_addr >> PAGE_SHIFT; pfn < max_pfn_mapped &&
(pfn << PAGE_SHIFT) < last_addr; pfn++) {
for (pfn = phys_addr >> PAGE_SHIFT;
(pfn << PAGE_SHIFT) < last_addr; pfn++) {
if (page_is_ram(pfn) && pfn_valid(pfn) &&
!PageReserved(pfn_to_page(pfn)))
return NULL;