netdev - Re: [PATCH net-next v2 2/3] net: dev: Makes sure netif

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Message-ID: <20220204201715.44f48f4f@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 4 Feb 2022 20:17:15 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Toke Høiland-Jørgensen 
        <toke@...e.dk>
Subject: Re: [PATCH net-next v2 2/3] net: dev: Makes sure netif_rx() can be
 invoked in any context.

On Fri,  4 Feb 2022 21:12:58 +0100 Sebastian Andrzej Siewior wrote:
> +int __netif_rx(struct sk_buff *skb)
> +{
> +	int ret;
> +
> +	trace_netif_rx_entry(skb);
> +	ret = netif_rx_internal(skb);
> +	trace_netif_rx_exit(ret);
> +	return ret;
> +}

Any reason this is not exported? I don't think there's anything wrong
with drivers calling this function, especially SW drivers which already
know to be in BH. I'd vote for roughly all of $(ls drivers/net/*.c) to
get the same treatment as loopback.