diff --git a/mm/migrate.c b/mm/migrate.c
index c0e9f15be2a2..7c5d2efb9d47 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -562,7 +562,7 @@ void pmd_migration_entry_wait(struct mm_struct *mm, pmd_t *pmd)
 static int __folio_migrate_mapping(struct address_space *mapping,
 		struct folio *newfolio, struct folio *folio, int expected_count)
 {
-	XA_STATE(xas, &mapping->i_pages, folio_index(folio));
+	XA_STATE(xas, &mapping->i_pages, folio->index);
 	struct swap_cluster_info *ci = NULL;
 	struct zone *oldzone, *newzone;
 	int dirty;
@@ -715,7 +715,7 @@ EXPORT_SYMBOL(folio_migrate_mapping);
 int migrate_huge_page_move_mapping(struct address_space *mapping,
 				   struct folio *dst, struct folio *src)
 {
-	XA_STATE(xas, &mapping->i_pages, folio_index(src));
+	XA_STATE(xas, &mapping->i_pages, src->index);
 	int rc, expected_count = folio_expected_ref_count(src) + 1;
 
 	if (folio_ref_count(src) != expected_count)
diff --git a/mm/swap.h b/mm/swap.h
index 8d8efdf1297a..d034c13d8dd2 100644
--- a/mm/swap.h
+++ b/mm/swap.h
@@ -445,25 +445,4 @@ static inline int non_swapcache_batch(swp_entry_t entry, int max_nr)
 	return 0;
 }
 #endif /* CONFIG_SWAP */
-
-/**
- * folio_index - File index of a folio.
- * @folio: The folio.
- *
- * For a folio which is either in the page cache or the swap cache,
- * return its index within the address_space it belongs to.  If you know
- * the folio is definitely in the page cache, you can look at the folio's
- * index directly.
- *
- * Return: The index (offset in units of pages) of a folio in its file.
- */
-static inline pgoff_t folio_index(struct folio *folio)
-{
-#ifdef CONFIG_SWAP
-	if (unlikely(folio_test_swapcache(folio)))
-		return swp_offset(folio->swap);
-#endif
-	return folio->index;
-}
-
 #endif /* _MM_SWAP_H */