linux-kernel - Re: [PATCH printk 11/18] printk: Convert console

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Date:   Sun, 25 Sep 2022 09:43:45 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Helge Deller <deller@....de>
Cc:     John Ogness <john.ogness@...utronix.de>,
        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,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-parisc@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH printk 11/18] printk: Convert console_drivers list to
 hlist

On (22/09/24 19:20), Helge Deller wrote:
> diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
> index 3f9abf0263ee..f15998aa47a8 100644
> --- a/arch/parisc/kernel/pdc_cons.c
> +++ b/arch/parisc/kernel/pdc_cons.c
> @@ -262,8 +262,6 @@ void __init pdc_console_init(void)
>   */
>  void pdc_console_restart(bool hpmc)
>  {
> -	struct console *console;
> -
>  	if (pdc_console_initialized)
>  		return;
> 
> @@ -275,8 +273,8 @@ void pdc_console_restart(bool hpmc)
>  		pdc_cons.flags &= ~CON_PRINTBUFFER;
> 
>  	while (!hlist_empty(&console_list)) {
> -		unregister_console(READ_ONCE(hlist_entry(console_list.first,
> -							 struct console, node)));
> +		unregister_console(hlist_entry(console_list.first,
> +						 struct console, node));

In this case we maybe can use cons_first() macro here (perhaps
give it a little more clear name (first_console()?) and move to
printk.h) and also do READ_ONCE there