mm: pass a folio to swap_writepage_bdev_sync()

Saves a call to compound_head().

Link: https://lkml.kernel.org/r/20231213215842.671461-5-willy@infradead.orgSigned-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/page_io.c

@@ -326,17 +326,16 @@ static void swap_writepage_fs(struct folio *folio, struct writeback_control *wbc
 		*wbc->swap_plug = sio;
 }
 
-static void swap_writepage_bdev_sync(struct page *page,
+static void swap_writepage_bdev_sync(struct folio *folio,
 		struct writeback_control *wbc, struct swap_info_struct *sis)
 {
 	struct bio_vec bv;
 	struct bio bio;
-	struct folio *folio = page_folio(page);
 
 	bio_init(&bio, sis->bdev, &bv, 1,
 		 REQ_OP_WRITE | REQ_SWAP | wbc_to_write_flags(wbc));
-	bio.bi_iter.bi_sector = swap_page_sector(page);
-	__bio_add_page(&bio, page, thp_size(page), 0);
+	bio.bi_iter.bi_sector = swap_page_sector(&folio->page);
+	bio_add_folio_nofail(&bio, folio, folio_size(folio), 0);
 
 	bio_associate_blkg_from_page(&bio, folio);
 	count_swpout_vm_event(folio);
@@ -381,7 +380,7 @@ void __swap_writepage(struct folio *folio, struct writeback_control *wbc)
 	if (data_race(sis->flags & SWP_FS_OPS))
 		swap_writepage_fs(folio, wbc);
 	else if (sis->flags & SWP_SYNCHRONOUS_IO)
-		swap_writepage_bdev_sync(&folio->page, wbc, sis);
+		swap_writepage_bdev_sync(folio, wbc, sis);
 	else
 		swap_writepage_bdev_async(&folio->page, wbc, sis);
 }