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mm: memcg-v1: make mem_cgroup_oom_notify_cb() return void

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Commit 7d74b06f24 ("memcg: use for_each_mem_cgroup") replaced the
mem_cgroup_walk_tree() call in mem_cgroup_oom_notify() with
for_each_mem_cgroup_tree(), but left mem_cgroup_oom_notify_cb() with the
int return type required by the old callback interface.

The function now has a single direct caller and no failure path.  Make it
return void.

Link: https://lore.kernel.org/20260713093737.3299646-1-guopeng.zhang@linux.dev
Signed-off-by: Guopeng Zhang <zhangguopeng@kylinos.cn>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Reviewed-by: SJ Park <sj@kernel.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Guopeng Zhang
2026-07-13 17:37:37 +08:00
committed by Andrew Morton
parent afe9ae3fda
commit 08d36b191f
1 changed files with 1 additions and 2 deletions
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3
mm/memcontrol-v1.c
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@@ -752,7 +752,7 @@ static int compare_thresholds(const void *a, const void *b)
return 0;
}
static int mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg)
static void mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg)
{
struct mem_cgroup_eventfd_list *ev;
@@ -762,7 +762,6 @@ static int mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg)
eventfd_signal(ev->eventfd);
spin_unlock(&memcg_oom_lock);
return 0;
}
static void mem_cgroup_oom_notify(struct mem_cgroup *memcg)