linux-kernel - Re: [PATCH 0/2] vsprintf: remove redundant %pCn format specifier

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Message-ID: <CAMuHMdUeThsk5tSaMnT-6BqO6XSMTTDo1Q9kRgJ_d5iC7MTdcw@mail.gmail.com>
Date: Fri, 7 Mar 2025 13:13:19 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Luca Ceresoli <luca.ceresoli@...tlin.com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Daniel Lezcano <daniel.lezcano@...aro.org>, 
	Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>, 
	Florian Fainelli <florian.fainelli@...adcom.com>, Ray Jui <rjui@...adcom.com>, 
	Scott Branden <sbranden@...adcom.com>, 
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, Petr Mladek <pmladek@...e.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
	Rasmus Villemoes <linux@...musvillemoes.dk>, Sergey Senozhatsky <senozhatsky@...omium.org>, 
	Jonathan Corbet <corbet@....net>, Andrew Morton <akpm@...ux-foundation.org>, 
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Liu Ying <victor.liu@....com>, linux-clk@...r.kernel.org, linux-pm@...r.kernel.org, 
	linux-rpi-kernel@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH 0/2] vsprintf: remove redundant %pCn format specifier

Hi Luca,

On Fri, 7 Mar 2025 at 12:19, Luca Ceresoli <luca.ceresoli@...tlin.com> wrote:
> There are two printk format specifiers for clocks: %pC and %pCn, and they
> print exactly the same string. The reason for having two is not totally
> clear (see discussion in patch 2), but there seem to be no advantage in
> having two instead of one.
>
> Definitely having two without properly documenting they do the same creates
> misunderstandings [0].
>
> Since %pCn is used in a single place, replace it with %pC and remove %pCn
> to simplify such format specifiers implementation and avoid
> misunderstandings.
>
> [0] https://lore.kernel.org/dri-devel/71c44221-b18b-4928-8faf-00893ec4a109@nxp.com/

The link looks unrelated?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds