mm/memcg: Add folio_lruvec()

This replaces mem_cgroup_page_lruvec().  All callers converted.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NMike Rapoport <rppt@linux.ibm.com>
Reviewed-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NVlastimil Babka <vbabka@suse.cz>

include/linux/memcontrol.h

@@ -784,18 +784,17 @@ static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg,
 }
 
 /**
- * mem_cgroup_page_lruvec - return lruvec for isolating/putting an LRU page
- * @page: the page
+ * folio_lruvec - return lruvec for isolating/putting an LRU folio
+ * @folio: Pointer to the folio.
  *
- * This function relies on page->mem_cgroup being stable.
+ * This function relies on folio->mem_cgroup being stable.
  */
-static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page)
+static inline struct lruvec *folio_lruvec(struct folio *folio)
 {
-	pg_data_t *pgdat = page_pgdat(page);
-	struct mem_cgroup *memcg = page_memcg(page);
+	struct mem_cgroup *memcg = folio_memcg(folio);
 
-	VM_WARN_ON_ONCE_PAGE(!memcg && !mem_cgroup_disabled(), page);
-	return mem_cgroup_lruvec(memcg, pgdat);
+	VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio);
+	return mem_cgroup_lruvec(memcg, folio_pgdat(folio));
 }
 
 struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
@@ -1256,10 +1255,9 @@ static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg,
 	return &pgdat->__lruvec;
 }
 
-static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page)
+static inline struct lruvec *folio_lruvec(struct folio *folio)
 {
-	pg_data_t *pgdat = page_pgdat(page);
-
+	struct pglist_data *pgdat = folio_pgdat(folio);
 	return &pgdat->__lruvec;
 }
 

mm/compaction.c

@@ -1022,7 +1022,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
 		if (!TestClearPageLRU(page))
 			goto isolate_fail_put;
 
-		lruvec = mem_cgroup_page_lruvec(page);
+		lruvec = folio_lruvec(page_folio(page));
 
 		/* If we already hold the lock, we can skip some rechecking */
 		if (lruvec != locked) {

mm/memcontrol.c

@@ -1154,9 +1154,10 @@ void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page)
  */
 struct lruvec *lock_page_lruvec(struct page *page)
 {
+	struct folio *folio = page_folio(page);
 	struct lruvec *lruvec;
 
-	lruvec = mem_cgroup_page_lruvec(page);
+	lruvec = folio_lruvec(folio);
 	spin_lock(&lruvec->lru_lock);
 
 	lruvec_memcg_debug(lruvec, page);
@@ -1166,9 +1167,10 @@ struct lruvec *lock_page_lruvec(struct page *page)
 
 struct lruvec *lock_page_lruvec_irq(struct page *page)
 {
+	struct folio *folio = page_folio(page);
 	struct lruvec *lruvec;
 
-	lruvec = mem_cgroup_page_lruvec(page);
+	lruvec = folio_lruvec(folio);
 	spin_lock_irq(&lruvec->lru_lock);
 
 	lruvec_memcg_debug(lruvec, page);
@@ -1178,9 +1180,10 @@ struct lruvec *lock_page_lruvec_irq(struct page *page)
 
 struct lruvec *lock_page_lruvec_irqsave(struct page *page, unsigned long *flags)
 {
+	struct folio *folio = page_folio(page);
 	struct lruvec *lruvec;
 
-	lruvec = mem_cgroup_page_lruvec(page);
+	lruvec = folio_lruvec(folio);
 	spin_lock_irqsave(&lruvec->lru_lock, *flags);
 
 	lruvec_memcg_debug(lruvec, page);

mm/swap.c

@@ -293,7 +293,8 @@ void lru_note_cost(struct lruvec *lruvec, bool file, unsigned int nr_pages)
 
 void lru_note_cost_page(struct page *page)
 {
-	lru_note_cost(mem_cgroup_page_lruvec(page),
+	struct folio *folio = page_folio(page);
+	lru_note_cost(folio_lruvec(folio),
 		      page_is_file_lru(page), thp_nr_pages(page));
 }
 

mm/workingset.c

@@ -397,6 +397,7 @@ void workingset_refault(struct page *page, void *shadow)
  */
 void workingset_activation(struct page *page)
 {
+	struct folio *folio = page_folio(page);
 	struct mem_cgroup *memcg;
 	struct lruvec *lruvec;
 
@@ -411,7 +412,7 @@ void workingset_activation(struct page *page)
 	memcg = page_memcg_rcu(page);
 	if (!mem_cgroup_disabled() && !memcg)
 		goto out;
-	lruvec = mem_cgroup_page_lruvec(page);
+	lruvec = folio_lruvec(folio);
 	workingset_age_nonresident(lruvec, thp_nr_pages(page));
 out:
 	rcu_read_unlock();