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Message-ID: <562D860B.2060008@huawei.com>
Date:	Mon, 26 Oct 2015 09:46:51 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	Alexei Starovoitov <ast@...mgrid.com>,
	Peter Zijlstra <peterz@...radead.org>
CC:	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...nel.org>, He Kuang <hekuang@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 2/3] bpf: introduce bpf_perf_event_output() helper



On 2015/10/24 1:25, Alexei Starovoitov wrote:
> On 10/23/15 9:42 AM, Peter Zijlstra wrote:
>> On Fri, Oct 23, 2015 at 08:02:00AM -0700, Alexei Starovoitov wrote:
>>> On 10/23/15 7:39 AM, Peter Zijlstra wrote:
>>>> On Tue, Oct 20, 2015 at 08:02:34PM -0700, Alexei Starovoitov wrote:
>>>>>> +static const struct bpf_func_proto bpf_perf_event_output_proto = {
>>>>>> +    .func        = bpf_perf_event_output,
>>>>>> +    .gpl_only    = false,
>>>> Oh ?
>>>
>>> no particular reason. key helper bpf_probe_read() is gpl, so all
>>> bpf for tracing progs have to be gpl.
>>> If you feel strongly about it, I can change it.
>>
>> All the perf symbols are export GPL, so I suppose this should be true.
>
> ok. will send a patch.
>

Can we (or have we already) setup some rules for licensing? Which part
should be GPL? Who has the response to decide it?

Thank you.


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