linux-kernel - Re: [PATCH v2] vsprintf: introduce %dE for error constants

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Date:   Tue, 27 Aug 2019 14:22:09 -0700
From:   Joe Perches <joe@...ches.com>
To:     Uwe Kleine-König <uwe@...ine-koenig.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Enrico@...ine-koenig.org, Weigelt@...ine-koenig.org,
        metux IT consult <lkml@...ux.net>
Cc:     Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] vsprintf: introduce %dE for error constants

On Tue, 2019-08-27 at 23:12 +0200, Uwe Kleine-König wrote:
> The new format specifier %dE introduced with this patch pretty-prints
> the typical negative error values. So
> 
> 	pr_info("probing failed (%dE)\n", ret);
> 
> yields
> 
> 	probing failed (EIO)
> 
> if ret holds -EIO. This is easier to understand than the for now common
> 
> 	probing failed (-5)

I suggest using both outputs like '-5 -EIO'
rather than a single string