linux-kernel - Re: register_device: was: Re: [PATCH v6 06/11] printk: console: Introduce sysfs interface for per-console loglevels

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Message-ID: <ZzZEW5pz5WWVruvd@chrisdown.name>
Date: Thu, 14 Nov 2024 13:41:31 -0500
From: Chris Down <chris@...isdown.name>
To: Petr Mladek <pmladek@...e.com>
Cc: linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	John Ogness <john.ogness@...utronix.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Tony Lindgren <tony.lindgren@...ux.intel.com>, kernel-team@...com
Subject: Re: register_device: was: Re: [PATCH v6 06/11] printk: console:
 Introduce sysfs interface for per-console loglevels

Petr Mladek writes:
>Honestly, I am not sure how to review this. I am not familiar with
>these APIs. I have spent few hours trying to investigate various
>drivers but I did not find any similar use case. I tried to look
>for documentation but I did not find any good HOWTO.
>
>It seems to work but it is the only thing that I could
>say about it ;-)
>
>Just by chance, do you have any pointers into a code or
>documentation which could help me to feel more comfortable?

I think you and I are in a similar boat :-) Some similar code can be seen in 
places like block/genhd.c in device_add_disk and __alloc_disk_node, which also 
do this kind of dynamic setup. I mostly just spent my time looking at device.h 
and its users.

Greg, maybe you could also take a look?