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From: John Ogness <john.ogness@linutronix.de>
To: Andrew Murray <amurray@thegoodpenguin.co.uk>,
	Petr Mladek <pmladek@suse.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: linux-kernel@vger.kernel.org,
	Andrew Murray <amurray@thegoodpenguin.co.uk>
Subject: Re: [PATCH v2 3/3] printk: Use console_flush_one_record for legacy printer kthread
Date: Tue, 30 Sep 2025 15:09:48 +0206	[thread overview]
Message-ID: <84ldlwjdmz.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <20250927-printk_legacy_thread_console_lock-v2-3-cff9f063071a@thegoodpenguin.co.uk>

On 2025-09-27, Andrew Murray <amurray@thegoodpenguin.co.uk> wrote:
> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> index e2c1cacdb4164489c60fe38f1e2837eb838107d6..2c9b9383df76de956a05211537264fd6e06366da 100644
> --- a/kernel/printk/printk.c
> +++ b/kernel/printk/printk.c
> @@ -3668,17 +3668,29 @@ static bool legacy_kthread_should_wakeup(void)
>  
>  static int legacy_kthread_func(void *unused)
>  {
> -	for (;;) {
> -		wait_event_interruptible(legacy_wait, legacy_kthread_should_wakeup());
> +	bool any_progress;
> +
> +wait_for_event:
> +	wait_event_interruptible(legacy_wait,
> +				 legacy_kthread_should_wakeup());
> +
> +	do {
> +		bool any_usable;
> +		bool handover = false;
> +		u64 next_seq;

Please sort by length. It looks nicer. ;-)

		bool handover = false;
		bool any_usable;
		u64 next_seq;

Note that it is fine that @any_usable is not initialized here because
legacy_kthread_func() does not actually care about this variable.

John

  reply	other threads:[~2025-09-30 13:03 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-27 22:05 [PATCH v2 0/3] printk: Release console_lock between printing records in legacy thread Andrew Murray
2025-09-27 22:05 ` [PATCH v2 1/3] printk: Introduce console_flush_one_record Andrew Murray
2025-09-30 12:54   ` John Ogness
2025-09-30 13:21     ` Andrew Murray
2025-10-03 13:29   ` Petr Mladek
2025-09-27 22:05 ` [PATCH v2 2/3] printk: console_flush_one_record() code cleanup Andrew Murray
2025-09-30 12:59   ` John Ogness
2025-09-30 15:14     ` Andrew Murray
2025-10-01  9:53       ` John Ogness
2025-10-01 16:26         ` Andrew Murray
2025-10-02 10:10           ` Petr Mladek
2025-10-03 16:19             ` Petr Mladek
2025-10-08 16:06               ` John Ogness
2025-09-27 22:05 ` [PATCH v2 3/3] printk: Use console_flush_one_record for legacy printer kthread Andrew Murray
2025-09-30 13:03   ` John Ogness [this message]
2025-09-30 13:20     ` Andrew Murray
2025-10-03 16:26   ` Petr Mladek
2025-10-08 16:15     ` John Ogness

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