linux-kernel - Re: [PATCH net-next 1/9] net: tcp: introduce tcp_drop

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Message-ID: <CADxym3YEdO8zGhUsd7S=kh+nfCsTYbK1guOYYbMSdswubNZQaw@mail.gmail.com>
Date:   Fri, 18 Feb 2022 10:28:18 +0800
From:   Menglong Dong <menglong8.dong@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Jakub Kicinski <kuba@...nel.org>, David Ahern <dsahern@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>,
        Ingo Molnar <mingo@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Menglong Dong <imagedong@...cent.com>,
        Talal Ahmad <talalahmad@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Alexander Lobakin <alobakin@...me>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Antoine Tenart <atenart@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Paolo Abeni <pabeni@...hat.com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Arnd Bergmann <arnd@...db.de>,
        Yajun Deng <yajun.deng@...ux.dev>,
        Roopa Prabhu <roopa@...dia.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Vasily Averin <vvs@...tuozzo.com>,
        Cong Wang <cong.wang@...edance.com>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        flyingpeng@...cent.com
Subject: Re: [PATCH net-next 1/9] net: tcp: introduce tcp_drop_reason()

On Thu, Feb 17, 2022 at 12:50 AM Steven Rostedt <rostedt@...dmis.org> wrote:
>
> On Wed, 16 Feb 2022 07:58:21 -0800
> Jakub Kicinski <kuba@...nel.org> wrote:
>
> > On Wed, 16 Feb 2022 11:54:18 +0800 menglong8.dong@...il.com wrote:
> > > +static inline void tcp_drop(struct sock *sk, struct sk_buff *skb)
> > > +{
> > > +   tcp_drop_reason(sk, skb, SKB_DROP_REASON_NOT_SPECIFIED);
> > >  }
> >
> > Please make this non-inline. The compiler will inline it anyway, and
> > if it's a static inline compiler will not warn us that it should be
> > removed once all callers are gone.
>
> I guess that's no longer true for C files.
>
>   https://lore.kernel.org/all/202202132037.4aN017dU-lkp@intel.com/
>

Ok, seems we can keep this inline still.

> -- Steve