netdev - Re: [PATCH bpf-next] bpf, tracing: unbreak lttng

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Message-ID: <24d0ff40-c6fd-6349-4a89-dffda22cb596@fb.com>
Date:   Mon, 26 Mar 2018 15:25:32 -0700
From:   Alexei Starovoitov <ast@...com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Alexei Starovoitov <ast@...nel.org>
CC:     <davem@...emloft.net>, <daniel@...earbox.net>,
        <torvalds@...ux-foundation.org>, <peterz@...radead.org>,
        <mathieu.desnoyers@...icios.com>, <netdev@...r.kernel.org>,
        <kernel-team@...com>, <linux-api@...r.kernel.org>
Subject: Re: [PATCH bpf-next] bpf, tracing: unbreak lttng

On 3/26/18 3:15 PM, Steven Rostedt wrote:
> On Mon, 26 Mar 2018 15:08:45 -0700
> Alexei Starovoitov <ast@...nel.org> wrote:
>
>> for_each_kernel_tracepoint() is used by out-of-tree lttng module
>> and therefore cannot be changed.
>> Instead introduce kernel_tracepoint_find_by_name() to find
>> tracepoint by name.
>>
>> Fixes: 9e9afbae6514 ("tracepoint: compute num_args at build time")
>> Signed-off-by: Alexei Starovoitov <ast@...nel.org>
>
> I'm curious, why can't you rebase? The first patch was never acked.

because I think it makes sense to keep such things in the commit log
and in the separate diff, so next developer is aware of what kind of
minefield the tracpoints are.
No wonder some maintainers refuse to add them.