Add new functions folio_memcg(), lock_folio_memcg(),
unlock_folio_memcg() and mem_cgroup_folio_lruvec(). These will
all be used by other functions later.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index e6dc793d587d..564ce61319d4 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -383,6 +383,11 @@ static inline struct mem_cgroup *page_memcg(struct page *page)
return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK);
}
+static inline struct mem_cgroup *folio_memcg(struct folio *folio)
+{
+ return page_memcg(&folio->page);
+}
+
/*
* page_memcg_rcu - locklessly get the memory cgroup associated with a page
* @page: a pointer to the page struct
@@ -871,6 +876,16 @@ struct mem_cgroup *lock_page_memcg(struct page *page);
void __unlock_page_memcg(struct mem_cgroup *memcg);
void unlock_page_memcg(struct page *page);
+static inline struct mem_cgroup *lock_folio_memcg(struct folio *folio)
+{
+ return lock_page_memcg(&folio->page);
+}
+
+static inline void unlock_folio_memcg(struct folio *folio)
+{
+ unlock_page_memcg(&folio->page);
+}
+
/*
* idx can be of type enum memcg_stat_item or node_stat_item.
* Keep in sync with memcg_exact_page_state().
@@ -1291,6 +1306,11 @@ mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg)
{
}
+static inline struct mem_cgroup *lock_folio_memcg(struct folio *folio)
+{
+ return NULL;
+}
+
static inline struct mem_cgroup *lock_page_memcg(struct page *page)
{
return NULL;
@@ -1300,6 +1320,10 @@ static inline void __unlock_page_memcg(struct mem_cgroup *memcg)
{
}
+static inline void unlock_folio_memcg(struct folio *folio)
+{
+}
+
static inline void unlock_page_memcg(struct page *page)
{
}
@@ -1431,6 +1455,12 @@ static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page)
}
#endif /* CONFIG_MEMCG */
+static inline struct lruvec *mem_cgroup_folio_lruvec(struct folio *folio,
+ struct pglist_data *pgdat)
+{
+ return mem_cgroup_page_lruvec(&folio->page, pgdat);
+}
+
static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
{
__mod_lruvec_kmem_state(p, idx, 1);
--
2.30.0
