Commit b2d5074d authored by Richard Weinberger's avatar Richard Weinberger Committed by Ben Hutchings

mm: Export migrate_page_move_mapping and migrate_page_copy

commit 1118dce7 upstream.

Export these symbols such that UBIFS can implement
->migratepage.
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
Acked-by: default avatarChristoph Hellwig <hch@lst.de>
[bwh: Backported to 3.2: also change migrate_page_move_mapping() from
 static to extern, done as part of an earlier commit upstream]
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent bedbc047
......@@ -43,6 +43,9 @@ extern int migrate_vmas(struct mm_struct *mm,
extern void migrate_page_copy(struct page *newpage, struct page *page);
extern int migrate_huge_page_move_mapping(struct address_space *mapping,
struct page *newpage, struct page *page);
extern int migrate_page_move_mapping(struct address_space *mapping,
struct page *newpage, struct page *page,
struct buffer_head *head, enum migrate_mode mode);
#else
#define PAGE_MIGRATION 0
......
......@@ -294,7 +294,7 @@ static inline bool buffer_migrate_lock_buffers(struct buffer_head *head,
* 2 for pages with a mapping
* 3 for pages with a mapping and PagePrivate/PagePrivate2 set.
*/
static int migrate_page_move_mapping(struct address_space *mapping,
int migrate_page_move_mapping(struct address_space *mapping,
struct page *newpage, struct page *page,
struct buffer_head *head, enum migrate_mode mode)
{
......@@ -377,6 +377,7 @@ static int migrate_page_move_mapping(struct address_space *mapping,
return 0;
}
EXPORT_SYMBOL(migrate_page_move_mapping);
/*
* The expected number of remaining references is the same as that
......@@ -476,6 +477,7 @@ void migrate_page_copy(struct page *newpage, struct page *page)
if (PageWriteback(newpage))
end_page_writeback(newpage);
}
EXPORT_SYMBOL(migrate_page_copy);
/************************************************************
* Migration functions
......
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