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Date:   Wed, 28 Aug 2019 21:51:44 +0100
From:   Mark Brown <broonie@kernel.org>
To:     Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= <uwe@kleine-koenig.org>
Cc:     Petr Mladek <pmladek@suse.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        "Enrico Weigelt, metux IT consult" <lkml@metux.net>,
        Jonathan Corbet <corbet@lwn.net>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Alexandre Belloni <alexandre.belloni@bootlin.com>
Subject: Re: [PATCH v2] vsprintf: introduce %dE for error constants
Message-ID: <20190828205144.GK4298@sirena.co.uk>
Mail-Followup-To: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= <uwe@kleine-koenig.org>,
        Petr Mladek <pmladek@suse.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        "Enrico Weigelt, metux IT consult" <lkml@metux.net>,
        Jonathan Corbet <corbet@lwn.net>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Alexandre Belloni <alexandre.belloni@bootlin.com>
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On Wed, Aug 28, 2019 at 09:59:16PM +0200, Uwe Kleine-K=F6nig wrote:
> On 8/28/19 1:32 PM, Petr Mladek wrote:

> > Please, do the opposite. Add conversion of few subsystems into the
> > patchset and add more people into CC. We will see immediately whether
> > it makes sense to spend time on this.

> For now I asked in the arm linux irc channel and got two people replying
> (both added to Cc:):

> Mark Brown (maintainer of SPI, regmap, ASoC and regulator) said:

> 1567019926 < broonie> ukleinek: I think that's a great idea and have
> 	thought about trying to implement it in the past.
> 1567019937 < broonie> ukleinek: Making the logs more directly readable
> 	is enormously helpful.

In the past I've actually implemented error code decoders like this for
some other systems I've worked on due to annoyance with having to look
up codes, as far as I can tell they went over quite well with other
developers and I certainly found them helpful myself.  They're also
useful to end users looking at logs, they're not always aware of how to
find the relevant error code definitions so a slightly more descriptive
messages can help people figure things out.

It does also occur to me that this might be useful to the people who
want to work on making probe deferral quieter since it gives them an
annotation that the number going in is an error code.  There's a bunch
more work to do there though.

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