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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: John Ogness <john.ogness@linutronix.de>
Cc: Junxiao Chang <junxiao.chang@intel.com>, tglx@linutronix.de,
	rostedt@goodmis.org, linux-kernel@vger.kernel.org,
	hao3.li@intel.com, lili.li@intel.com, jianfeng.gao@intel.com,
	linux-rt-users@vger.kernel.org
Subject: Re: [PATCH 1/2] printk: nbcon: move locked_port flag to struct
 uart_port
Message-ID: <20240124100524.ZyAPfPU5@linutronix.de>
References: <BN9PR11MB5370AED9C562F9DA75093557EC742@BN9PR11MB5370.namprd11.prod.outlook.com>
 <20240123054033.183114-1-junxiao.chang@intel.com>
 <20240123054033.183114-2-junxiao.chang@intel.com>
 <87le8f9i75.fsf@jogness.linutronix.de>
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In-Reply-To: <87le8f9i75.fsf@jogness.linutronix.de>

On 2024-01-24 10:53:10 [+0106], John Ogness wrote:
> On 2024-01-23, Junxiao Chang <junxiao.chang@intel.com> wrote:
> > Console pointer in uart_port might be shared among multiple uart
> > ports.
> 
> I still want to investigate why the pointer is shared. This sounds
> sloppy or dangerous.

I have x86 a server box and PNP enumerates two UARTs (8250). Only one is
wired up but both can be specified as console=.
What do I need to do to reproduce this here? Using console= twice does
not do the trick.

Sebastian