linux-kernel - Re: [PATCH v2 0/2] printk_ringbuffer: don't needlessly wrap data blocks around

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Message-ID: <84bjnhx91r.fsf@jogness.linutronix.de>
Date: Thu, 11 Sep 2025 18:18:32 +0206
From: John Ogness <john.ogness@...utronix.de>
To: Petr Mladek <pmladek@...e.com>, Daniil Tatianin <d-tatianin@...dex-team.ru>
Cc: linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
 Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: Re: [PATCH v2 0/2] printk_ringbuffer: don't needlessly wrap data
 blocks around

On 2025-09-11, Petr Mladek <pmladek@...e.com> wrote:
> diff --git a/kernel/printk/printk_ringbuffer_kunit_test.c b/kernel/printk/printk_ringbuffer_kunit_test.c
> index 2282348e869a..241f7ef49ac6 100644
> --- a/kernel/printk/printk_ringbuffer_kunit_test.c
> +++ b/kernel/printk/printk_ringbuffer_kunit_test.c
> @@ -56,7 +56,7 @@ struct prbtest_rbdata {
>  	char text[] __counted_by(size);
>  };
>  
> -#define MAX_RBDATA_TEXT_SIZE 0x80
> +#define MAX_RBDATA_TEXT_SIZE (0x256 - sizeof(struct prbtest_rbdata))

I guess this should be:

#define MAX_RBDATA_TEXT_SIZE (256  - sizeof(struct prbtest_rbdata))

John