linux-kernel - Re: [PATCH v2 net-next 4/4] bpftool: implement cgroup bpf operations

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Date:   Fri, 8 Dec 2017 14:56:15 +0100
From:   Philippe Ombredanne <pombredanne@...b.com>
To:     Roman Gushchin <guro@...com>
Cc:     netdev@...r.kernel.org,
        Quentin Monnet <quentin.monnet@...ronome.com>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@...com,
        ast@...nel.org, daniel@...earbox.net, jakub.kicinski@...ronome.com,
        kafai@...com, David Ahern <dsahern@...il.com>
Subject: Re: [PATCH v2 net-next 4/4] bpftool: implement cgroup bpf operations

On Fri, Dec 8, 2017 at 11:34 AM, Quentin Monnet
<quentin.monnet@...ronome.com> wrote:
> 2017-12-07 18:39 UTC+0000 ~ Roman Gushchin <guro@...com>
>> This patch adds basic cgroup bpf operations to bpftool:
>> cgroup list, attach and detach commands.

[...]
>> --- /dev/null
>> +++ b/tools/bpf/bpftool/cgroup.c
>> @@ -0,0 +1,305 @@
>> +/*
>> + * Copyright (C) 2017 Facebook
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License
>> + * as published by the Free Software Foundation; either version
>> + * 2 of the License, or (at your option) any later version.
>> + *
>> + *
>> + */
>> +

Roman,
Have you considered using the simpler and new SPDX ids instead? e.g.:

// SPDX-License-Identifier: GPL-2.0+
// Copyright (C) 2017 Facebook
// Author: Roman Gushchin <guro@...com>

This would boost your code/comments ratio nicely IMHO.

For  reference please check Linus [1][2][3], Thomas [4] and Greg [5]
comments on the topic of C++ style // comments!

Jonathan also wrote a nice background article on the SPDXification
topic at LWN [6]


PS: and if you could spread the word at FB, that would we awesome!

[1] https://lkml.org/lkml/2017/11/2/715
[2] https://lkml.org/lkml/2017/11/25/125
[3] https://lkml.org/lkml/2017/11/25/133
[4] https://lkml.org/lkml/2017/11/2/805
[5] https://lkml.org/lkml/2017/10/19/165
[6] https://lwn.net/Articles/739183/

-- 
Cordially
Philippe Ombredanne