[PATCH 1/3] mm/memcg: revise the using condition of lock_page_lruvec function series

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The series function could be used under lock_page_memcg(), add this and
a bit style changes following commit_charge().

Signed-off-by: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: cgroups@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 mm/memcontrol.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b80328f52fb4..e6b50d068b2f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1345,10 +1345,11 @@ void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page)
  * lock_page_lruvec - lock and return lruvec for a given page.
  * @page: the page
  *
- * This series functions should be used in either conditions:
- * PageLRU is cleared or unset
- * or page->_refcount is zero
- * or page is locked.
+ * This series functions should be used in any one of following conditions:
+ * - PageLRU is cleared or unset
+ * - page->_refcount is zero
+ * - page is locked.
+ * - lock_page_memcg()
  */
 struct lruvec *lock_page_lruvec(struct page *page)
 {
-- 
2.29.GIT





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