linux-kernel - printk + errno texts

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Message-ID: <15580396-3016-2670-ed80-f462e472e2d8@gr13.net>
Date:   Sun, 25 Jun 2017 15:33:47 +0200
From:   "Enrico Weigelt, metux IT consult" <enrico.weigelt@...3.net>
To:     linux-kernel@...r.kernel.org
Subject: printk + errno texts

Hi folks,

I'd like to introduce a new printk() conversion which prints out
errno values as readable text.

Where are these things defined ?

I'd guess the actual translation must be somewhere in lib/vsprintf.c,
but where are the format string checks defined ?

thx
--mtx