From: Sebastian Andrzej Siewior Date: Tue, 3 Jul 2018 12:56:19 +0200 Subject: [PATCH 1/4] mm/list_lru: use list_lru_walk_one() in list_lru_walk_node() Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.18/older/patches-4.18.16-rt9.tar.xz list_lru_walk_node() invokes __list_lru_walk_one() with -1 as the memcg_idx parameter. The same can be achieved by list_lru_walk_one() and passing NULL as memcg argument which then gets converted into -1. This is a preparation step when the spin_lock() function is lifted to the caller of __list_lru_walk_one(). Invoke list_lru_walk_one() instead __list_lru_walk_one() when possible. Signed-off-by: Sebastian Andrzej Siewior --- mm/list_lru.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -272,8 +272,8 @@ unsigned long list_lru_walk_node(struct long isolated = 0; int memcg_idx; - isolated += __list_lru_walk_one(lru, nid, -1, isolate, cb_arg, - nr_to_walk); + isolated += list_lru_walk_one(lru, nid, NULL, isolate, cb_arg, + nr_to_walk); if (*nr_to_walk > 0 && list_lru_memcg_aware(lru)) { for_each_memcg_cache_index(memcg_idx) { isolated += __list_lru_walk_one(lru, nid, memcg_idx,