Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [3/16] HWPOISON: Export some rmap vma locking to outside world | Date | Wed, 27 May 2009 22:12:28 +0200 (CEST) |
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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>
--- include/linux/rmap.h | 6 ++++++ mm/rmap.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-)
Index: linux/include/linux/rmap.h =================================================================== --- linux.orig/include/linux/rmap.h 2009-05-27 21:13:54.000000000 +0200 +++ linux/include/linux/rmap.h 2009-05-27 21:19:19.000000000 +0200 @@ -118,6 +118,12 @@ } #endif +/* + * 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) Index: linux/mm/rmap.c =================================================================== --- linux.orig/mm/rmap.c 2009-05-26 22:15:37.000000000 +0200 +++ linux/mm/rmap.c 2009-05-27 21:19:19.000000000 +0200 @@ -191,7 +191,7 @@ * Getting a lock on a stable anon_vma from a page off the LRU is * tricky: page_lock_anon_vma rely on RCU to guard against the races. */ -static struct anon_vma *page_lock_anon_vma(struct page *page) +struct anon_vma *page_lock_anon_vma(struct page *page) { struct anon_vma *anon_vma; unsigned long anon_mapping; @@ -211,7 +211,7 @@ return NULL; } -static void page_unlock_anon_vma(struct anon_vma *anon_vma) +void page_unlock_anon_vma(struct anon_vma *anon_vma) { spin_unlock(&anon_vma->lock); rcu_read_unlock();
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