linux-kernel - Re: [PATCH printk v2 01/12] printk: rename cpulock functions

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Date:   Wed, 6 Apr 2022 11:07:01 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Marco Elver <elver@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Alexander Potapenko <glider@...gle.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Nicholas Piggin <npiggin@...il.com>
Subject: Re: [PATCH printk v2 01/12] printk: rename cpulock functions

On Tue 2022-04-05 15:31:24, John Ogness wrote:
> Since the printk cpulock is CPU-reentrant and since it is used
> in all contexts, its usage must be carefully considered and
> most likely will require programming locklessly. To avoid
> mistaking the printk cpulock as a typical lock, rename it to
> cpu_sync. The main functions then become:
> 
>     printk_cpu_sync_get_irqsave(flags);
>     printk_cpu_sync_put_irqrestore(flags);
> 
> Add extra notes of caution in the function description to help
> developers understand the requirements for correct usage.
>
> Signed-off-by: John Ogness <john.ogness@...utronix.de>

Looks good the me.

Reviewed-by: Petr Mladek <pmladek@...e.com>

Best Regards,
Petr