Commit 93ef70a2 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds

[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: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1f5ee8da
...@@ -272,7 +272,7 @@ void iounmap(volatile void __iomem *addr) ...@@ -272,7 +272,7 @@ void iounmap(volatile void __iomem *addr)
if ((p->flags >> 20) && if ((p->flags >> 20) &&
p->phys_addr + p->size - 1 < virt_to_phys(high_memory)) { p->phys_addr + p->size - 1 < virt_to_phys(high_memory)) {
/* p->size includes the guard page, but cpa doesn't like that */ /* 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, p->size >> PAGE_SHIFT,
PAGE_KERNEL); PAGE_KERNEL);
global_flush_tlb(); global_flush_tlb();
......
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