linux-kernel - [PATCH 3/9] mm: memcontrol: rename memcg_shrinker_map_mutex to memcg_shrinker

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Message-Id: <20201202182725.265020-4-shy828301@gmail.com>
Date:   Wed,  2 Dec 2020 10:27:19 -0800
From:   Yang Shi <shy828301@...il.com>
To:     guro@...com, ktkhai@...tuozzo.com, shakeelb@...gle.com,
        david@...morbit.com, hannes@...xchg.org, mhocko@...e.com,
        akpm@...ux-foundation.org
Cc:     shy828301@...il.com, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/9] mm: memcontrol: rename memcg_shrinker_map_mutex to memcg_shrinker_mutex

The following patch will add memcg_shrinker_deferred which could be protected by
the same mutex, rename it to a more common name.

Signed-off-by: Yang Shi <shy828301@...il.com>
---
 mm/memcontrol.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 29459a6ce1c7..19e41684c96b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -395,7 +395,7 @@ EXPORT_SYMBOL(memcg_kmem_enabled_key);
 #endif
 
 static int memcg_shrinker_map_size;
-static DEFINE_MUTEX(memcg_shrinker_map_mutex);
+static DEFINE_MUTEX(memcg_shrinker_mutex);
 
 static void memcg_free_shrinker_map_rcu(struct rcu_head *head)
 {
@@ -408,7 +408,7 @@ static int memcg_expand_one_shrinker_map(struct mem_cgroup *memcg,
 	struct memcg_shrinker_map *new, *old;
 	int nid;
 
-	lockdep_assert_held(&memcg_shrinker_map_mutex);
+	lockdep_assert_held(&memcg_shrinker_mutex);
 
 	for_each_node(nid) {
 		old = rcu_dereference_protected(
@@ -458,7 +458,7 @@ static int memcg_alloc_shrinker_maps(struct mem_cgroup *memcg)
 	if (mem_cgroup_is_root(memcg))
 		return 0;
 
-	mutex_lock(&memcg_shrinker_map_mutex);
+	mutex_lock(&memcg_shrinker_mutex);
 	size = memcg_shrinker_map_size;
 	for_each_node(nid) {
 		map = kvzalloc_node(sizeof(*map) + size, GFP_KERNEL, nid);
@@ -469,7 +469,7 @@ static int memcg_alloc_shrinker_maps(struct mem_cgroup *memcg)
 		}
 		rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, map);
 	}
-	mutex_unlock(&memcg_shrinker_map_mutex);
+	mutex_unlock(&memcg_shrinker_mutex);
 
 	return ret;
 }
@@ -484,7 +484,7 @@ int memcg_expand_shrinker_maps(int new_id)
 	if (size <= old_size)
 		return 0;
 
-	mutex_lock(&memcg_shrinker_map_mutex);
+	mutex_lock(&memcg_shrinker_mutex);
 	if (!root_mem_cgroup)
 		goto unlock;
 
@@ -500,7 +500,7 @@ int memcg_expand_shrinker_maps(int new_id)
 unlock:
 	if (!ret)
 		memcg_shrinker_map_size = size;
-	mutex_unlock(&memcg_shrinker_map_mutex);
+	mutex_unlock(&memcg_shrinker_mutex);
 	return ret;
 }
 
-- 
2.26.2