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[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.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
hifive-unleashed-5.1
Andi Kleen 2005-05-16 21:53:24 -07:00 committed by Linus Torvalds
parent 1f5ee8da00
commit 93ef70a217
1 changed files with 1 additions and 1 deletions
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2
arch/x86_64/mm/ioremap.c
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@ -272,7 +272,7 @@ 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_SHIFT,
PAGE_KERNEL);
global_flush_tlb();