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-rw-r--r--mm/memcontrol.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8dd7fbed5a94..46713b9ece06 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5024,6 +5024,19 @@ void mem_cgroup_sk_free(struct sock *sk)
css_put(&sk->sk_memcg->css);
}
+void mem_cgroup_sk_inherit(const struct sock *sk, struct sock *newsk)
+{
+ if (sk->sk_memcg == newsk->sk_memcg)
+ return;
+
+ mem_cgroup_sk_free(newsk);
+
+ if (sk->sk_memcg)
+ css_get(&sk->sk_memcg->css);
+
+ newsk->sk_memcg = sk->sk_memcg;
+}
+
/**
* mem_cgroup_charge_skmem - charge socket memory
* @memcg: memcg to charge