linux-kernel - Re: [PATCH] checkpatch: remove %p4cn

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Message-ID: <1490923bf0b7d5e32ded1393c1f7a3e4e640de5b.camel@perches.com>
Date: Tue, 29 Apr 2025 10:35:48 -0700
From: Joe Perches <joe@...ches.com>
To: Aditya Garg <gargaditya08@...e.com>, pmladek@...e.com
Cc: admin@...eit.net, airlied@...hat.com, akpm@...ux-foundation.org, 
	alyssa@...enzweig.io, andriy.shevchenko@...ux.intel.com, apw@...onical.com,
 	asahi@...ts.linux.dev, corbet@....net, dri-devel@...ts.freedesktop.org, 
	dwaipayanray1@...il.com, geert@...ux-m68k.org, kees@...nel.org, 
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux@...musvillemoes.dk, lukas.bulwahn@...il.com, marcan@...can.st, 
	mripard@...nel.org, rostedt@...dmis.org, senozhatsky@...omium.org,
 simona@...ll.ch, 	sven@...npeter.dev, tamird@...il.com, tzimmermann@...e.de
Subject: Re: [PATCH] checkpatch: remove %p4cn

On Tue, 2025-04-29 at 16:07 +0000, Aditya Garg wrote:
> %p4cn was recently removed and replaced by %p4chR in vsprintf. So,
> remove the check for %p4cn from checkpatch.pl.
> 
> Fixes: 37eed892cc5f ("vsprintf: Use %p4chR instead of %p4cn for reading data in reversed host ordering")
> 
> Signed-off-by: Aditya Garg <gargaditya08@...e.com>
> ---
>  scripts/checkpatch.pl | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 44e233b6f..f79f0a085 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -6891,7 +6891,7 @@ sub process {
>  					    ($extension eq "f" &&
>  					     defined $qualifier && $qualifier !~ /^w/) ||
>  					    ($extension eq "4" &&
> -					     defined $qualifier && $qualifier !~ /^c[hnlbc]/)) {
> +					     defined $qualifier && $qualifier !~ /^c[hlbc]/)) {

Probably needs to be something like:

					$qualifier !~ /^c(?:[hlbc]|cR)$/

>  						$bad_specifier = $specifier;
>  						last;
>  					}