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platform_kernel-5.15
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cgroup: net_cls: Remove rcu_read_lock/unlock 

As Eric pointed out:
"Hey task_cls_classid() has its own rcu protection since commit
3fb5a99191 (cls_cgroup: Fix rcu lockdep warning)

So we can safely revert Paul commit (1144182a87)
(We no longer need rcu_read_lock/unlock here)"

Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: netdev@vger.kernel.org
Cc: cgroups@vger.kernel.org
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Wagner 2012-10-25 04:16:57 +00:00 committed by David S. Miller
parent 920750ce38
commit 3ace03cc2a
1 changed files with 0 additions and 2 deletions
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2
net/core/sock.c
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@ -1221,9 +1221,7 @@ void sock_update_classid(struct sock *sk)
{ {
u32 classid; u32 classid;
rcu_read_lock(); /* doing current task, which cannot vanish. */
classid = task_cls_classid(current); classid = task_cls_classid(current);
rcu_read_unlock();
if (classid != sk->sk_classid) if (classid != sk->sk_classid)
sk->sk_classid = classid; sk->sk_classid = classid;
} }