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Subject[patch 16/16] x86_64: Don't look up struct page pointer of physical address in iounmap
[PATCH] x86_64: Don't look up struct page pointer of physical address in iounmap

It could be in a memory hole not mapped in mem_map and that causes the hash
lookup to go off to nirvana.

Back port to -stable tree by Chris Wright

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Chris Wright <chrisw@osdl.org>
---

ioremap.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)

Index: release-2.6.11/arch/x86_64/mm/ioremap.c
===================================================================
--- release-2.6.11.orig/arch/x86_64/mm/ioremap.c
+++ release-2.6.11/arch/x86_64/mm/ioremap.c
@@ -266,7 +266,7 @@ void iounmap(volatile void __iomem *addr
if ((p->flags >> 20) &&
p->phys_addr + p->size - 1 < virt_to_phys(high_memory)) {
/* p->size includes the guard page, but cpa doesn't like that */
- change_page_attr(virt_to_page(__va(p->phys_addr)),
+ change_page_attr_addr((unsigned long)(__va(p->phys_addr)),
(p->size - PAGE_SIZE) >> PAGE_SHIFT,
PAGE_KERNEL);
global_flush_tlb();
-
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