linux-kernel - Re: [PATCH v3] printk_legacy_map: use LD_WAIT_CONFIG instead of LD_WAIT

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Message-ID: <874irkspu5.fsf@jogness.linutronix.de>
Date: Mon, 27 Oct 2025 09:43:06 +0106
From: John Ogness <john.ogness@...utronix.de>
To: Oleg Nesterov <oleg@...hat.com>, Petr Mladek <pmladek@...e.com>,
 Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] printk_legacy_map: use LD_WAIT_CONFIG instead of
 LD_WAIT_SLEEP

On 2025-10-26, Oleg Nesterov <oleg@...hat.com> wrote:
> printk_legacy_map is used to hide lock nesting violations caused by
> legacy drivers and is using the wrong override type. LD_WAIT_SLEEP is
> for always sleeping lock types such as mutex_t. LD_WAIT_CONFIG is for
> lock type which are sleeping while spinning on PREEMPT_RT such as
> spinlock_t.
>
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Reviewed-by: John Ogness <john.ogness@...utronix.de>