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From:   John Ogness <john.ogness@linutronix.de>
To:     Helge Deller <deller@gmx.de>, Petr Mladek <pmladek@suse.com>
Cc:     Sergey Senozhatsky <senozhatsky@chromium.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-kernel@vger.kernel.org,
        "James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-parisc@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH printk 11/18] printk: Convert console_drivers list to hlist
In-Reply-To: <db7bdf7a-597f-398e-9877-01e898733664@gmx.de>
References: <20220924000454.3319186-1-john.ogness@linutronix.de>
 <20220924000454.3319186-12-john.ogness@linutronix.de>
 <Yzb7Oh2Y8feej+Eh@alley> <db7bdf7a-597f-398e-9877-01e898733664@gmx.de>
Date:   Fri, 30 Sep 2022 21:52:35 +0206
Message-ID: <8735c88x2c.fsf@jogness.linutronix.de>
MIME-Version: 1.0
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On 2022-09-30, Helge Deller <deller@gmx.de> wrote:
>> I know that it is all hope for good. But there is also a race between
>> the hlist_empty() and hlist_entry().
>
> I wonder if pdc_console() is still needed as it is today.  When this
> was written, early_console and such didn't worked for parisc as it
> should. That's proably why we have this register/unregister in here.
>
> Would it make sense, and would we gain something for this
> printk-series, if I'd try to convert pdc_console to a standard
> earlycon or earlyprintk device?

Having an earlycon or earlyprintk device will not really help you here
since those drivers will have already unregistered.

However, once we get the new atomic/kthread interface available, it
certainly would be useful to implement the pdc_console as an atomic
console.

John Ogness