Convert the incoming page to a folio and operate on it.  Removes a
reference to page->mapping which is going away soon.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 
 static void f2fs_compress_free_page(struct page *page)
 {
+       struct folio *folio;
+
        if (!page)
                return;
-       detach_page_private(page);
-       page->mapping = NULL;
-       unlock_page(page);
+       folio = page_folio(page);
+       folio_detach_private(folio);
+       folio->mapping = NULL;
+       folio_unlock(folio);
        mempool_free(page, compress_page_pool);
 }