mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

[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>
This commit is contained in:
Andi Kleen 2005-05-17 04:53:24 +00:00 committed by
parent c7df5dfb58
commit 361716975a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86_64/mm/ioremap.c
View File

@ -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();