[PATCH] page migration cleanup: remove useless definitions

Remove the export for migrate_page_remove_references() and migrate_page_copy()
that are unlikely to be used directly by filesystems implementing migration.
The export was useful when buffer_migrate_page() lived in fs/buffer.c but it
has now been moved to migrate.c in the migration reorg.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 6789c4940c9c919d6091c19f8679e342c0c85cdd..e8d3b08cc3542310df75cbe0d9bb7f45446d476c 100644 (file)
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -7,8 +7,6 @@
 extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
 extern int putback_lru_pages(struct list_head *l);
 extern int migrate_page(struct page *, struct page *);
-extern void migrate_page_copy(struct page *, struct page *);
-extern int migrate_page_remove_references(struct page *, struct page *, int);
 extern int migrate_pages(struct list_head *l, struct list_head *t,
                struct list_head *moved, struct list_head *failed);
 extern int migrate_pages_to(struct list_head *pagelist,

diff --git a/mm/migrate.c b/mm/migrate.c
index 49e71ddb67920ceb78e5768076784ea92bed68e0..be3f141e53a42a4aad9d4b5678f06a3f343154d2 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -169,7 +169,7 @@ retry:
  * Remove references for a page and establish the new page with the correct
  * basic settings to be able to stop accesses to the page.
  */
-int migrate_page_remove_references(struct page *newpage,
+static int migrate_page_remove_references(struct page *newpage,
                                struct page *page, int nr_refs)
 {
        struct address_space *mapping = page_mapping(page);
@@ -246,12 +246,11 @@ int migrate_page_remove_references(struct page *newpage,
 
        return 0;
 }
-EXPORT_SYMBOL(migrate_page_remove_references);
 
 /*
  * Copy the page to its new location
  */
-void migrate_page_copy(struct page *newpage, struct page *page)
+static void migrate_page_copy(struct page *newpage, struct page *page)
 {
        copy_highpage(newpage, page);
 
@@ -286,7 +285,6 @@ void migrate_page_copy(struct page *newpage, struct page *page)
        if (PageWriteback(newpage))
                end_page_writeback(newpage);
 }
-EXPORT_SYMBOL(migrate_page_copy);
 
 /************************************************************
  *                    Migration functions