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mm/migrate: Convert fallback_migrate_page() to fallback_migrate_folio()

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Use a folio throughout.  migrate_page() will be converted to
migrate_folio() later.

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 09:34:36 -04:00
parent 5490da4f06
commit 8faa8ef5dd
1 changed files with 9 additions and 10 deletions
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19
mm/migrate.c
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@ -805,11 +805,11 @@ static int writeout(struct address_space *mapping, struct page *page)
/*
* Default handling if a filesystem does not provide a migration function.
*/
static int fallback_migrate_page(struct address_space *mapping,
struct page *newpage, struct page *page, enum migrate_mode mode)
static int fallback_migrate_folio(struct address_space *mapping,
struct folio *dst, struct folio *src, enum migrate_mode mode)
{
if (PageDirty(page)) {
/* Only writeback pages in full synchronous migration */
if (folio_test_dirty(src)) {
/* Only writeback folios in full synchronous migration */
switch (mode) {
case MIGRATE_SYNC:
case MIGRATE_SYNC_NO_COPY:
@ -817,18 +817,18 @@ static int fallback_migrate_page(struct address_space *mapping,
default:
return -EBUSY;
}
return writeout(mapping, page);
return writeout(mapping, &src->page);
}
/*
* Buffers may be managed in a filesystem specific way.
* We must have no buffers or drop them.
*/
if (page_has_private(page) &&
!try_to_release_page(page, GFP_KERNEL))
if (folio_test_private(src) &&
!filemap_release_folio(src, GFP_KERNEL))
return mode == MIGRATE_SYNC ? -EAGAIN : -EBUSY;
return migrate_page(mapping, newpage, page, mode);
return migrate_page(mapping, &dst->page, &src->page, mode);
}
/*
@ -870,8 +870,7 @@ static int move_to_new_folio(struct folio *dst, struct folio *src,
rc = mapping->a_ops->migratepage(mapping, &dst->page,
&src->page, mode);
else
rc = fallback_migrate_page(mapping, &dst->page,
&src->page, mode);
rc = fallback_migrate_folio(mapping, dst, src, mode);
} else {
const struct movable_operations *mops;