From b5855a26dedf210bcc1deb4cb30f9f657571a28a Mon Sep 17 00:00:00 2001 From: Roman Gushchin Date: Fri, 28 Jun 2024 21:03:12 +0000 Subject: [PATCH] mm: memcg: gather memcg1-specific fields initialization in memcg1_memcg_init() Gather all memcg1-specific struct mem_cgroup's members initialization in a new memcg1_memcg_init() function, defined in mm/memcontrol-v1.c. Obviously, if CONFIG_MEMCG_V1 is not set, there is no need to initialize these fields, so the function becomes trivial. Link: https://lkml.kernel.org/r/20240628210317.272856-5-roman.gushchin@linux.dev Signed-off-by: Roman Gushchin Acked-by: Shakeel Butt Cc: Johannes Weiner Cc: Michal Hocko Cc: Muchun Song Signed-off-by: Andrew Morton --- mm/memcontrol-v1.c | 9 +++++++++ mm/memcontrol-v1.h | 2 ++ mm/memcontrol.c | 6 +----- 3 files changed, 12 insertions(+), 5 deletions(-) diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c index c1d5076927a6..7218884bc3c9 100644 --- a/mm/memcontrol-v1.c +++ b/mm/memcontrol-v1.c @@ -1961,6 +1961,15 @@ out_kfree: return ret; } +void memcg1_memcg_init(struct mem_cgroup *memcg) +{ + INIT_LIST_HEAD(&memcg->oom_notify); + mutex_init(&memcg->thresholds_lock); + spin_lock_init(&memcg->move_lock); + INIT_LIST_HEAD(&memcg->event_list); + spin_lock_init(&memcg->event_list_lock); +} + void memcg1_css_offline(struct mem_cgroup *memcg) { struct mem_cgroup_event *event, *tmp; diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h index a5e35eb8374f..56d7eaa98274 100644 --- a/mm/memcontrol-v1.h +++ b/mm/memcontrol-v1.h @@ -71,6 +71,7 @@ int memory_stat_show(struct seq_file *m, void *v); /* Cgroup v1-specific declarations */ #ifdef CONFIG_MEMCG_V1 +void memcg1_memcg_init(struct mem_cgroup *memcg); void memcg1_remove_from_trees(struct mem_cgroup *memcg); static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) @@ -119,6 +120,7 @@ extern struct cftype mem_cgroup_legacy_files[]; #else /* CONFIG_MEMCG_V1 */ +static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {} static inline void memcg1_remove_from_trees(struct mem_cgroup *memcg) {} static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {} static inline bool memcg1_wait_acct_move(struct mem_cgroup *memcg) { return false; } diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c6a5b0c60247..d1ae097f0351 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3589,13 +3589,9 @@ static struct mem_cgroup *mem_cgroup_alloc(struct mem_cgroup *parent) goto fail; INIT_WORK(&memcg->high_work, high_work_func); - INIT_LIST_HEAD(&memcg->oom_notify); - mutex_init(&memcg->thresholds_lock); - spin_lock_init(&memcg->move_lock); vmpressure_init(&memcg->vmpressure); - INIT_LIST_HEAD(&memcg->event_list); - spin_lock_init(&memcg->event_list_lock); memcg->socket_pressure = jiffies; + memcg1_memcg_init(memcg); #ifdef CONFIG_MEMCG_KMEM memcg->kmemcg_id = -1; INIT_LIST_HEAD(&memcg->objcg_list);