netdev - Re: [PATCH v0 00/42] notifiers: Return an error when callback is already registered

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Message-ID: <20211108112313.73d0727e@gandalf.local.home>
Date:   Mon, 8 Nov 2021 11:23:13 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Ayush Sawal <ayush.sawal@...lsio.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rohit Maheshwari <rohitm@...lsio.com>,
        Vinay Kumar Yadav <vinay.yadav@...lsio.com>,
        alsa-devel@...a-project.org, bcm-kernel-feedback-list@...adcom.com,
        intel-gfx@...ts.freedesktop.org,
        intel-gvt-dev@...ts.freedesktop.org, linux-alpha@...r.kernel.org,
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Subject: Re: [PATCH v0 00/42] notifiers: Return an error when callback is
 already registered

On Mon, 8 Nov 2021 15:35:50 +0100
Borislav Petkov <bp@...en8.de> wrote:

> On Mon, Nov 08, 2021 at 03:24:39PM +0100, Borislav Petkov wrote:
> > I guess I can add another indirection to notifier_chain_register() and
> > avoid touching all the call sites.  
> 
> IOW, something like this below.
> 
> This way I won't have to touch all the callsites and the registration
> routines would still return a proper value instead of returning 0
> unconditionally.

I prefer this method.

Question, how often does this warning trigger? Is it common to see in
development?

-- Steve