[PATCH] mm: list_lru: mark expected switch fall-through

[Gustavo A. R. Silva]

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Signed-off-by: Gustavo A. R. Silva <garsi...@embeddedor.com>
---
This code was tested by compilation only (GCC 7.2.0 was used).
Please, verify if the actual intention of the code is to fall through.

 mm/list_lru.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/list_lru.c b/mm/list_lru.c
index f8c7de8..278db98 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -222,6 +222,7 @@ __list_lru_walk_one(struct list_lru *lru, int nid, int 
memcg_idx,
                switch (ret) {
                case LRU_REMOVED_RETRY:
                        assert_spin_locked(&nlru->lock);
+                       /* fall through */
                case LRU_REMOVED:
                        isolated++;
                        nlru->nr_items--;
-- 
2.7.4