linux-kernel - Re: [PATCH RT] printk: console must not schedule for drivers

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Message-ID: <20200416110446.fjw3yhav73bxxtro@linutronix.de>
Date:   Thu, 16 Apr 2020 13:04:46 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org
Subject: Re: [PATCH RT] printk: console must not schedule for drivers

On 2020-04-16 10:13:23 [+0200], John Ogness wrote:
> > - So before the re-rewrite, console_unlock() set this 0 before
> >   invoking the console drivers so it was always 0. I assume it was
> >   called with disabled interrupts.
> 
> Correct.

le me apply that even if it looks like a fix at the wrong spot. However,
it only affects PREEMPT_VOLUNTARY so…

> John Ogness

Sebastian