linux-kernel - Re: lockdep splat during suspend

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Message-ID: <20161117170458.5cz3wt762dvgauv5@pd.tnic>
Date:   Thu, 17 Nov 2016 18:04:58 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: lockdep splat during suspend

On Thu, Nov 17, 2016 at 05:31:55PM +0100, Thomas Gleixner wrote:
> --- a/kernel/printk/printk.c
> +++ b/kernel/printk/printk.c
> @@ -2194,8 +2194,10 @@ void resume_console(void)
>   */
>  static int console_cpu_notify(unsigned int cpu)
>  {
> -	console_lock();
> -	console_unlock();
> +	if (!cpuhp_tasks_frozen) {
> +		console_lock();
> +		console_unlock();
> +	}
>  	return 0;
>  }

Reported-and-tested-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

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