page migration: Remove unnecessarily exported functions

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>

Index: linux-2.6.17-rc3/mm/migrate.c
===================================================================
--- linux-2.6.17-rc3.orig/mm/migrate.c	2006-04-28 17:24:03.935627108 -0700
+++ linux-2.6.17-rc3/mm/migrate.c	2006-04-28 17:26:13.866044400 -0700
@@ -169,7 +169,7 @@
  * 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 @@
 
 	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 @@
 	if (PageWriteback(newpage))
 		end_page_writeback(newpage);
 }
-EXPORT_SYMBOL(migrate_page_copy);
 
 /************************************************************
  *                    Migration functions
Index: linux-2.6.17-rc3/include/linux/migrate.h
===================================================================
--- linux-2.6.17-rc3.orig/include/linux/migrate.h	2006-04-26 19:19:25.000000000 -0700
+++ linux-2.6.17-rc3/include/linux/migrate.h	2006-04-28 17:26:13.867020902 -0700
@@ -8,8 +8,6 @@
 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,