netdev - Re: [PATCH net] net: Use this_cpu_inc() to increment net->core

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Message-ID: <20220422125632.3636444b@kernel.org>
Date:   Fri, 22 Apr 2022 12:56:32 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH net] net: Use this_cpu_inc() to increment
 net->core_stats

On Thu, 21 Apr 2022 16:00:20 +0200 Sebastian Andrzej Siewior wrote:
> @@ -3851,7 +3851,7 @@ static inline struct net_device_core_stats *dev_core_stats(struct net_device *de

I think this needs to return __percpu now?
Double check sparse is happy for v2, pls.

>  	struct net_device_core_stats __percpu *p = READ_ONCE(dev->core_stats);
>  
>  	if (likely(p))
> -		return this_cpu_ptr(p);
> +		return p;