iomap: Convert iomap_migrate_page() to use folios

The arguments are still pages for now, but we can use folios internally
and cut out a lot of calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index e7f28f4..ed79605 100644 (file)
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -504,19 +504,21 @@ int
 iomap_migrate_page(struct address_space *mapping, struct page *newpage,
                struct page *page, enum migrate_mode mode)
 {
+       struct folio *folio = page_folio(page);
+       struct folio *newfolio = page_folio(newpage);
        int ret;
 
-       ret = migrate_page_move_mapping(mapping, newpage, page, 0);
+       ret = folio_migrate_mapping(mapping, newfolio, folio, 0);
        if (ret != MIGRATEPAGE_SUCCESS)
                return ret;
 
-       if (page_has_private(page))
-               attach_page_private(newpage, detach_page_private(page));
+       if (folio_test_private(folio))
+               folio_attach_private(newfolio, folio_detach_private(folio));
 
        if (mode != MIGRATE_SYNC_NO_COPY)
-               migrate_page_copy(newpage, page);
+               folio_migrate_copy(newfolio, folio);
        else
-               migrate_page_states(newpage, page);
+               folio_migrate_flags(newfolio, folio);
        return MIGRATEPAGE_SUCCESS;
 }
 EXPORT_SYMBOL_GPL(iomap_migrate_page);