[PATCH v2 13/21] mm: workingset: use xas_set_lru() to pass shadow_nodes

[Muchun Song]

The workingset will add the xa_node to shadow_nodes, so we should use
xas_set_lru() to pass the list_lru which we want to insert xa_node
into to set up the xa_node reclaim context correctly.

Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
---
 include/linux/swap.h | 5 ++++-
 mm/workingset.c      | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 46d51d058d05..a2e1363b1509 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -323,9 +323,12 @@ void workingset_activation(struct page *page);
 
 /* Only track the nodes of mappings with shadow entries */
 void workingset_update_node(struct xa_node *node);
+extern struct list_lru shadow_nodes;
 #define mapping_set_update(xas, mapping) do {				\
-	if (!dax_mapping(mapping) && !shmem_mapping(mapping))		\
+	if (!dax_mapping(mapping) && !shmem_mapping(mapping)) {		\
 		xas_set_update(xas, workingset_update_node);		\
+		xas_set_lru(xas, &shadow_nodes);			\
+	}								\
 } while (0)
 
 /* linux/mm/page_alloc.c */
diff --git a/mm/workingset.c b/mm/workingset.c
index 4f7a306ce75a..e50827fc3994 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -426,7 +426,7 @@ void workingset_activation(struct page *page)
  * point where they would still be useful.
  */
 
-static struct list_lru shadow_nodes;
+struct list_lru shadow_nodes;
 
 void workingset_update_node(struct xa_node *node)
 {
-- 
2.11.0