linux-kernel - Re: Change of behaviour when console=null and ttynull driver is used

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Date:   Sun, 26 Mar 2023 20:38:31 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Petr Mladek <pmladek@...e.com>,
        Guillermo Rodriguez Garcia <guille.rodriguez@...il.com>,
        linux-kernel@...r.kernel.org,
        Alejandro Vazquez <avazquez.dev@...il.com>,
        sergey.senozhatsky@...il.com, rostedt@...dmis.org,
        shreyasjoshi15@...il.com
Subject: Re: Change of behaviour when console=null and ttynull driver is used

On Sun, Mar 26, 2023 at 04:20:16PM -0700, Linus Torvalds wrote:
> On Fri, Mar 24, 2023 at 8:08 AM Petr Mladek <pmladek@...e.com> wrote:
> >
> > I need an advice whether to revert the commit 3cffa06aeef7ece30f
> > ("printk/console: Allow to disable console output by using
> > console="" or console=null").
> 
> I think it's too late to revert it by now. It sounds like people who
> were affected are either chrome developers that already changed their
> setup, or embedded people who similarly have already reacted to it.
> 

Autually, our (non-)solution was to revert the patches in question in
all ChromeOS branches.

> This went into 5.11, it's ancient history by now, so reverting it
> would likely just cause more issues.
> 
Agreed. Maybe we'll find a better solution at some point, but for now
we'll just keep the reverts in ChromeOS.

Guenter