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HWPOISON: Export some rmap vma locking to outside world

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Needed for later patch that walks rmap entries on its own.

This used to be very frowned upon, but memory-failure.c does
some rather specialized rmap walking and rmap has been stable
for quite some time, so I think it's ok now to export it.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Andi Kleen 2009-09-16 11:50:04 +02:00 • committed by Andi Kleen
commit 10be22dfe1
2 changed files with 8 additions and 2 deletions
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6
include/linux/rmap.h
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@ -112,6 +112,12 @@ int page_mkclean(struct page *);
*/
int try_to_munlock(struct page *);
/*
* Called by memory-failure.c to kill processes.
*/
struct anon_vma *page_lock_anon_vma(struct page *page);
void page_unlock_anon_vma(struct anon_vma *anon_vma);
#else /* !CONFIG_MMU */
#define anon_vma_init() do {} while (0)