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From: John Ogness <john.ogness@linutronix.de>
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To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Jiri Slaby
 <jirislaby@kernel.org>, Petr Mladek <pmladek@suse.com>, Sergey Senozhatsky
 <senozhatsky@chromium.org>, Steven Rostedt <rostedt@goodmis.org>, Thomas
 Gleixner <tglx@linutronix.de>, linux-serial@vger.kernel.org,
 linux-kernel@vger.kernel.org, Tony Lindgren <tony@atomide.com>, "Paul E.
 McKenney" <paulmck@kernel.org>, Uwe =?utf-8?Q?Kleine-K=C3=B6nig?=
 <u.kleine-koenig@pengutronix.de>, Ilpo =?utf-8?Q?J=C3=A4rvinen?=
 <ilpo.jarvinen@linux.intel.com>, Serge Semin <fancer.lancer@gmail.com>,
 Rengarajan S <rengarajan.s@microchip.com>, Wolfram Sang
 <wsa+renesas@sang-engineering.com>, Florian Fainelli
 <f.fainelli@gmail.com>, Jeff Johnson <quic_jjohnson@quicinc.com>, Lino
 Sanfilippo <l.sanfilippo@kunbus.com>, Derek Barbosa <debarbos@redhat.com>
Subject: Re: [PATCH tty-next v1 0/2] convert 8250 to nbcon
In-Reply-To: <Ztm36qPI7fVteSX_@smile.fi.intel.com>
References: <20240905134719.142554-1-john.ogness@linutronix.de>
 <Ztm36qPI7fVteSX_@smile.fi.intel.com>
Date: Thu, 05 Sep 2024 16:11:24 +0206
Message-ID: <87frqe2o2j.fsf@jogness.linutronix.de>
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On 2024-09-05, Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:
>> $  cat /proc/consoles
>> ttyS0                -W- (EC N  a)    4:64
>> 
>> The 'N' shows that it is an NBCON console.
>> 
>> There will also be a dedicated printing kthread. For example:
>> 
>> $ ps ax | grep pr/
>>    16 root       0:00 [pr/ttyS0]
>
> Wondering if this can use the DEVNAME instead of opaque (to some extent) ttySx?
> Or is it using the same what has been passed to the console= kernel command line
> parameter?

fs/proc/consoles.c:show_console_dev() is just using:

"%s%d", con->name, con->index

The same goes for drivers/tty/tty_io.c:show_cons_active(), which is
responsible for the contents of:

/sys/devices/virtual/tty/console/active

John Ogness