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authorMatthew Wilcox (Oracle) <willy@infradead.org>2022-06-06 13:29:10 -0400
committerMatthew Wilcox (Oracle) <willy@infradead.org>2022-08-02 12:34:04 -0400
commit9800562f2ab41656b0bdc2a41c77ab3f6dfdd6fc (patch)
treedd6bf30c13ca28682344ac3868845fa1ec66091a
parent9d0ddc0cb575fd41ff16131b06e08e1feac43b81 (diff)
mm/folio-compat: Remove migration compatibility functions
migrate_page_move_mapping(), migrate_page_copy() and migrate_page_states() are all now unused after converting all the filesystems from aops->migratepage() to aops->migrate_folio(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
-rw-r--r--include/linux/migrate.h11
-rw-r--r--mm/folio-compat.c22
-rw-r--r--mm/ksm.c2
3 files changed, 1 insertions, 34 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 13f793309b75..ae5bb67a9ba1 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -70,12 +70,8 @@ extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free,
extern struct page *alloc_migration_target(struct page *page, unsigned long private);
extern int isolate_movable_page(struct page *page, isolate_mode_t mode);
-extern void migrate_page_states(struct page *newpage, struct page *page);
-extern void migrate_page_copy(struct page *newpage, struct page *page);
int migrate_huge_page_move_mapping(struct address_space *mapping,
struct folio *dst, struct folio *src);
-extern int migrate_page_move_mapping(struct address_space *mapping,
- struct page *newpage, struct page *page, int extra_count);
void migration_entry_wait_on_locked(swp_entry_t entry, pte_t *ptep,
spinlock_t *ptl);
void folio_migrate_flags(struct folio *newfolio, struct folio *folio);
@@ -96,13 +92,6 @@ static inline struct page *alloc_migration_target(struct page *page,
static inline int isolate_movable_page(struct page *page, isolate_mode_t mode)
{ return -EBUSY; }
-static inline void migrate_page_states(struct page *newpage, struct page *page)
-{
-}
-
-static inline void migrate_page_copy(struct page *newpage,
- struct page *page) {}
-
static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
struct folio *dst, struct folio *src)
{
diff --git a/mm/folio-compat.c b/mm/folio-compat.c
index 20bc15b57d93..458618c7302c 100644
--- a/mm/folio-compat.c
+++ b/mm/folio-compat.c
@@ -51,28 +51,6 @@ void mark_page_accessed(struct page *page)
}
EXPORT_SYMBOL(mark_page_accessed);
-#ifdef CONFIG_MIGRATION
-int migrate_page_move_mapping(struct address_space *mapping,
- struct page *newpage, struct page *page, int extra_count)
-{
- return folio_migrate_mapping(mapping, page_folio(newpage),
- page_folio(page), extra_count);
-}
-EXPORT_SYMBOL(migrate_page_move_mapping);
-
-void migrate_page_states(struct page *newpage, struct page *page)
-{
- folio_migrate_flags(page_folio(newpage), page_folio(page));
-}
-EXPORT_SYMBOL(migrate_page_states);
-
-void migrate_page_copy(struct page *newpage, struct page *page)
-{
- folio_migrate_copy(page_folio(newpage), page_folio(page));
-}
-EXPORT_SYMBOL(migrate_page_copy);
-#endif
-
bool set_page_writeback(struct page *page)
{
return folio_start_writeback(page_folio(page));
diff --git a/mm/ksm.c b/mm/ksm.c
index 54f78c9eecae..e8f8c1a2bb39 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -712,7 +712,7 @@ again:
* however, it might mean that the page is under page_ref_freeze().
* The __remove_mapping() case is easy, again the node is now stale;
* the same is in reuse_ksm_page() case; but if page is swapcache
- * in migrate_page_move_mapping(), it might still be our page,
+ * in folio_migrate_mapping(), it might still be our page,
* in which case it's essential to keep the node.
*/
while (!get_page_unless_zero(page)) {