linux-kernel - Re: [PATCH printk v3 02/14] printk: Adjust mapping for 32bit seq macros

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Message-ID: <8734w3hj2z.fsf@jogness.linutronix.de>
Date: Fri, 15 Dec 2023 11:16:44 +0106
From: John Ogness <john.ogness@...utronix.de>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Petr Mladek <pmladek@...e.com>, Sergey Senozhatsky
 <senozhatsky@...omium.org>, Steven Rostedt <rostedt@...dmis.org>, Thomas
 Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org, Francesco
 Dolcini <francesco@...cini.it>, kernel test robot <oliver.sang@...el.com>
Subject: Re: [PATCH printk v3 02/14] printk: Adjust mapping for 32bit seq
 macros

On 2023-12-15, Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:
> On 2023-12-14 22:47:49 [+0106], John Ogness wrote:
>> Note: This change only applies to 32bit architectures. On 64bit
>>       architectures the macros are NOPs.
>
> You lost my authorship.

OK. Thanks for speaking up. (And thanks for doing the heavy lifting
researching the needed change.)

> But serious matter: Is this bug already present in the current printk
> tree or is this code just not used and enabled later? Patch #1 from
> this series moves the sequence around so is this problem introduced in
> the previous patch and fixed here?

No, it is not a bug at this point. As the commit message writes:

"Until now this mapping has been correct for all call sites."

But if the mapping is not changed here, it will become a bug after
applying patch 3 of this series.

John