netdev - Re: [PATCH v2 bpf-next] bpf, tracing: unbreak lttng

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Message-ID: <20180326200704.27cb86fa@gandalf.local.home>
Date:   Mon, 26 Mar 2018 20:07:04 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     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 v2 bpf-next] bpf, tracing: unbreak lttng

On Mon, 26 Mar 2018 16:02:20 -0700
Alexei Starovoitov <ast@...nel.org> wrote:

> for_each_kernel_tracepoint() is used by out-of-tree lttng module
> and therefore cannot be changed.

This is false and misleading. NACK.

-- Steve

> 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>
> ---
> v1->v2: fix 'undef CONFIG_TRACEPOINTS' build as spotted by Mathieu
>