[PATCH v3 17/18] mm/memcg: Add folio_lruvec_relock_irq() and folio_lruvec_relock_irqsave()

["Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>]

These are the folio equivalents of relock_page_lruvec_irq() and
folio_lruvec_relock_irqsave(), which are retained as compatibility wrappers.
Also convert lruvec_holds_page_lru_lock() to folio_lruvec_holds_lru_lock().

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 include/linux/memcontrol.h | 31 ++++++++++++++++++++++---------
 mm/vmscan.c                |  2 +-
 2 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index b21a77669277..e6b5e8fbf770 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1545,40 +1545,53 @@ static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec,
 }
 
 /* Test requires a stable page->memcg binding, see page_memcg() */
-static inline bool page_matches_lruvec(struct page *page, struct lruvec *lruvec)
+static inline bool folio_matches_lruvec(struct folio *folio,
+		struct lruvec *lruvec)
 {
-	return lruvec_pgdat(lruvec) == page_pgdat(page) &&
-	       lruvec_memcg(lruvec) == page_memcg(page);
+	return lruvec_pgdat(lruvec) == folio_pgdat(folio) &&
+	       lruvec_memcg(lruvec) == folio_memcg(folio);
 }
 
 /* Don't lock again iff page's lruvec locked */
-static inline struct lruvec *relock_page_lruvec_irq(struct page *page,
+static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio,
 		struct lruvec *locked_lruvec)
 {
 	if (locked_lruvec) {
-		if (page_matches_lruvec(page, locked_lruvec))
+		if (folio_matches_lruvec(folio, locked_lruvec))
 			return locked_lruvec;
 
 		unlock_page_lruvec_irq(locked_lruvec);
 	}
 
-	return lock_page_lruvec_irq(page);
+	return folio_lruvec_lock_irq(folio);
 }
 
 /* Don't lock again iff page's lruvec locked */
-static inline struct lruvec *relock_page_lruvec_irqsave(struct page *page,
+static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio,
 		struct lruvec *locked_lruvec, unsigned long *flags)
 {
 	if (locked_lruvec) {
-		if (page_matches_lruvec(page, locked_lruvec))
+		if (folio_matches_lruvec(folio, locked_lruvec))
 			return locked_lruvec;
 
 		unlock_page_lruvec_irqrestore(locked_lruvec, *flags);
 	}
 
-	return lock_page_lruvec_irqsave(page, flags);
+	return folio_lruvec_lock_irqsave(folio, flags);
 }
 
+static inline struct lruvec *relock_page_lruvec_irq(struct page *page,
+		struct lruvec *locked_lruvec)
+{
+	return folio_lruvec_relock_irq(page_folio(page), locked_lruvec);
+}
+
+static inline struct lruvec *relock_page_lruvec_irqsave(struct page *page,
+		struct lruvec *locked_lruvec, unsigned long *flags)
+{
+	return folio_lruvec_relock_irqsave(page_folio(page), locked_lruvec,
+			flags);
+}
 #ifdef CONFIG_CGROUP_WRITEBACK
 
 struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d7c3cb8688dd..a8d8f4673451 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2063,7 +2063,7 @@ static unsigned int move_pages_to_lru(struct lruvec *lruvec,
 		 * All pages were isolated from the same lruvec (and isolation
 		 * inhibits memcg migration).
 		 */
-		VM_BUG_ON_PAGE(!page_matches_lruvec(page, lruvec), page);
+		VM_BUG_ON_PAGE(!folio_matches_lruvec(page_folio(page), lruvec), page);
 		add_page_to_lru_list(page, lruvec);
 		nr_pages = thp_nr_pages(page);
 		nr_moved += nr_pages;
-- 
2.30.2