Commit 93ef70a2 authored May 16, 2005 by Andi Kleen Committed by Linus Torvalds May 17, 2005

[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>

parent 1f5ee8da

arch/x86_64/mm/ioremap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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();