linux-kernel - Re: [PATCH printk v2 08/26] printk: nbcon: Implement processing in port->lock wrapper

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Date: Mon, 19 Feb 2024 17:58:41 +0106
From: John Ogness <john.ogness@...utronix.de>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Petr Mladek <pmladek@...e.com>, Sergey Senozhatsky
 <senozhatsky@...omium.org>, Steven Rostedt <rostedt@...dmis.org>, Thomas
 Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org, Greg
 Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby
 <jirislaby@...nel.org>, Ilpo Järvinen
 <ilpo.jarvinen@...ux.intel.com>,
 Tony Lindgren <tony@...mide.com>, Geert Uytterhoeven
 <geert+renesas@...der.be>, Justin Chen <justin.chen@...adcom.com>, Jiaqing
 Zhao <jiaqing.zhao@...ux.intel.com>, linux-serial@...r.kernel.org
Subject: Re: [PATCH printk v2 08/26] printk: nbcon: Implement processing in
 port->lock wrapper

On 2024-02-19, Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:
>>> The headers in this file is a mess. But here you can at least keep the
>>> piece ordered, can you?
>> 
>> Just to clarify, you would like to see this ordering and inclusion?
>
> Roughly, yes. Ideally it is quite likely that kernel.h is being used as
> a 'proxy' header. Nowadays, it's rare the code needs kernel.h.

So I took the time to painfully discover every header that is required
for nbcon.c without any proxy usage. It came down to this:

#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/compiler.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/irqflags.h>
#include <linux/minmax.h>
#include <linux/percpu-defs.h>
#include <linux/preempt.h>
#include <linux/serial_core.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/types.h>
#include "internal.h"

For the next version of this series I will only add the includes you
suggested, but will follow-up with a patch that fixes all proxy headers
for nbcon.c. As a separate patch it will help with bisecting in case the
ordering causes an explosion on some config/architecture.

John