[PATCH 4/7] mm: Remove page_ref_sub_return()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

With all callers converted to folios, we can act directly on
folio->_refcount.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/page_ref.h | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h
index d7c2d33baa7f..1acf5bac7f50 100644
--- a/include/linux/page_ref.h
+++ b/include/linux/page_ref.h
@@ -139,20 +139,15 @@ static inline void folio_ref_sub(struct folio *folio, int nr)
 	page_ref_sub(&folio->page, nr);
 }
 
-static inline int page_ref_sub_return(struct page *page, int nr)
+static inline int folio_ref_sub_return(struct folio *folio, int nr)
 {
-	int ret = atomic_sub_return(nr, &page->_refcount);
+	int ret = atomic_sub_return(nr, &folio->_refcount);
 
 	if (page_ref_tracepoint_active(page_ref_mod_and_return))
-		__page_ref_mod_and_return(page, -nr, ret);
+		__page_ref_mod_and_return(&folio->page, -nr, ret);
 	return ret;
 }
 
-static inline int folio_ref_sub_return(struct folio *folio, int nr)
-{
-	return page_ref_sub_return(&folio->page, nr);
-}
-
 static inline void page_ref_inc(struct page *page)
 {
 	atomic_inc(&page->_refcount);
-- 
2.43.0