[PATCH 7/7] mm: make page_lock_anon_vma static

[Hugh Dickins <hugh@veritas.com>]

page_lock_anon_vma() and page_unlock_anon_vma() were made available to
show_page_path() in vmscan.c; but now that has been removed, make them
static in rmap.c again, they're better kept private if possible.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
---

 include/linux/rmap.h |    3 ---
 mm/rmap.c            |    4 ++--
 2 files changed, 2 insertions(+), 5 deletions(-)

--- mmclean6/include/linux/rmap.h	2008-10-24 09:28:24.000000000 +0100
+++ mmclean7/include/linux/rmap.h	2008-11-19 15:26:33.000000000 +0000
@@ -63,9 +63,6 @@ void anon_vma_unlink(struct vm_area_stru
 void anon_vma_link(struct vm_area_struct *);
 void __anon_vma_link(struct vm_area_struct *);
 
-extern struct anon_vma *page_lock_anon_vma(struct page *page);
-extern void page_unlock_anon_vma(struct anon_vma *anon_vma);
-
 /*
  * rmap interfaces called when adding or removing pte of page
  */
--- mmclean6/mm/rmap.c	2008-11-19 15:26:28.000000000 +0000
+++ mmclean7/mm/rmap.c	2008-11-19 15:26:33.000000000 +0000
@@ -193,7 +193,7 @@ void __init anon_vma_init(void)
  * 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.
  */
-struct anon_vma *page_lock_anon_vma(struct page *page)
+static struct anon_vma *page_lock_anon_vma(struct page *page)
 {
 	struct anon_vma *anon_vma;
 	unsigned long anon_mapping;
@@ -213,7 +213,7 @@ out:
 	return NULL;
 }
 
-void page_unlock_anon_vma(struct anon_vma *anon_vma)
+static void page_unlock_anon_vma(struct anon_vma *anon_vma)
 {
 	spin_unlock(&anon_vma->lock);
 	rcu_read_unlock();

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