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Date:   Mon, 24 Jun 2019 16:58:10 -0400
From:   "Frank Ch. Eigler" <fche@redhat.com>
To:     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Jessica Yu <jeyu@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>, jikos@kernel.org,
        mbenes@suse.cz, Petr Mladek <pmladek@suse.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrew Morton <akpm@linux-foundation.org>,
        Robert Richter <rric@kernel.org>,
        rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@redhat.com>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        paulmck <paulmck@linux.ibm.com>,
        "Joel Fernandes, Google" <joel@joelfernandes.org>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        oprofile-list@lists.sf.net, netdev <netdev@vger.kernel.org>,
        bpf@vger.kernel.org
Subject: Re: [PATCH 2/3] module: Fix up module_notifier return values.
Message-ID: <20190624205810.GD26422@redhat.com>
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Hi -

> > While auditing all module notifiers I noticed a whole bunch of fail
> > wrt the return value. Notifiers have a 'special' return semantics.

From peterz's comments, the patches, it's not obvious to me how one is
to choose between 0 (NOTIFY_DONE) and 1 (NOTIFY_OK) in the case of a
routine success.

> [...]
> I have a similar erroneous module notifier return value pattern
> in lttng-modules as well. I'll go fix it right away. CCing
> Frank Eigler from SystemTAP which AFAIK use a copy of
> lttng-tracepoint.c in their project, which should be fixed
> as well. I'm pasting the lttng-modules fix below.

Sure, following suit.  Thanks.

- FChE