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mm: Export migrate_page_move_mapping and migrate_page_copy

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commit 1118dce773d84f39ebd51a9fe7261f9169cb056e upstream.

Export these symbols such that UBIFS can implement
->migratepage.

Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[wt: also add the prototype to include/linux/migrate.h]

Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Richard Weinberger
2016-06-16 23:26:14 +02:00
committed by Willy Tarreau
parent 1e766c1750
commit 31f476515d
2 changed files with 5 additions and 0 deletions
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include/linux/migrate.h
+3
View File
@@ -55,6 +55,9 @@ 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
static inline void putback_lru_pages(struct list_head *l) {}
mm/migrate.c
+2
View File
@@ -412,6 +412,7 @@ static int migrate_page_move_mapping(struct address_space *mapping,
return MIGRATEPAGE_SUCCESS;
}
EXPORT_SYMBOL(migrate_page_move_mapping);
/*
* The expected number of remaining references is the same as that
@@ -503,6 +504,7 @@ void migrate_page_copy(struct page *newpage, struct page *page)
if (PageWriteback(newpage))
end_page_writeback(newpage);
}
EXPORT_SYMBOL(migrate_page_copy);
/************************************************************
* Migration functions