[PATCH 5.18 595/879] drivers/base/node.c: fix compaction sysfs file leak

[Greg Kroah-Hartman]

From: Miaohe Lin <linmiaohe@xxxxxxxxxx>

[ Upstream commit da63dc84befaa9e6079a0bc363ff0eaa975f9073 ]

Compaction sysfs file is created via compaction_register_node in
register_node.  But we forgot to remove it in unregister_node.  Thus
compaction sysfs file is leaked.  Using compaction_unregister_node to fix
this issue.

Link: https://lkml.kernel.org/r/20220401070905.43679-1-linmiaohe@xxxxxxxxxx
Fixes: ed4a6d7f0676 ("mm: compaction: add /sys trigger for per-node memory compaction")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Rafael J. Wysocki <rafael@xxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/base/node.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index ec8bb24a5a22..0ac6376ef7a1 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -682,6 +682,7 @@ static int register_node(struct node *node, int num)
  */
 void unregister_node(struct node *node)
 {
+	compaction_unregister_node(node);
 	hugetlb_unregister_node(node);		/* no-op, if memoryless node */
 	node_remove_accesses(node);
 	node_remove_caches(node);
-- 
2.35.1