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From:   Alexei Starovoitov <alexei.starovoitov@gmail.com>
Date:   Mon, 17 Jun 2019 16:27:33 -0700
Message-ID: <CAADnVQKCeHrq+bf4DceH7+ihpq+q-V+bFOiF-TpYjekH7dPA0w@mail.gmail.com>
Subject: Re: [PATCH] bpf: hide do_bpf_send_signal when unused
To:     Matt Mullins <mmullins@fb.com>
Cc:     "rostedt@goodmis.org" <rostedt@goodmis.org>,
        Song Liu <songliubraving@fb.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "daniel@iogearbox.net" <daniel@iogearbox.net>,
        "bpf@vger.kernel.org" <bpf@vger.kernel.org>,
        "ast@kernel.org" <ast@kernel.org>,
        "mingo@redhat.com" <mingo@redhat.com>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        Martin Lau <kafai@fb.com>, Yonghong Song <yhs@fb.com>,
        "arnd@arndb.de" <arnd@arndb.de>, Andrii Nakryiko <andriin@fb.com>
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On Mon, Jun 17, 2019 at 4:13 PM Matt Mullins <mmullins@fb.com> wrote:
> >
> > The bug (really just a warning) reported is exactly here.
>
> I don't think bpf_send_signal is tied to modules at all;
> send_signal_irq_work_init and the corresponding initcall should be
> moved outside that #ifdef.

right. I guess send_signal_irq_work_init was accidentally placed
after bpf_event_init and happened to be within that ifdef.
Should definitely be outside.