82dce14b49356c6db10bb6f4ba1713
parent c4d1fcf3a2ea89b6d6221fa8b4588c77aff50995
author Andi Kleen <ak@suse.de> 1116624477 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1116629300 -0700

[PATCH] x86_64: Fixed guard page handling again in iounmap

Caused oopses again.  Also fix potential mismatch in checking if
change_page_attr was needed.

To do it without races I needed to change mm/vmalloc.c to export a
__remove_vm_area that does not take vmlist lock.

Noticed by Terence Ripperda and based on a patch of his.

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