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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>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-06-06 13:29:10 -04:00
parent 9d0ddc0cb5
commit 9800562f2a
3 changed files with 1 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/linux/migrate.h
View File

@ -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)
{

22
mm/folio-compat.c
View File

@ -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));

2
mm/ksm.c
View File

@ -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)) {