linux-kernel - Re: [PATCH printk 13/18] printk: Move buffer size defines

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Message-ID: <Yz/tTt+V5MxraquY@alley>
Date:   Fri, 7 Oct 2022 11:11:42 +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,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH printk 13/18] printk: Move buffer size defines

On Sat 2022-09-24 02:10:49, John Ogness wrote:
> From: Thomas Gleixner <tglx@...utronix.de>
> 
> Move the buffer size defines to console.h in preparation of adding a buffer
> structure.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: John Ogness <john.ogness@...utronix.de>
> ---
>  include/linux/console.h | 14 ++++++++++++++
>  include/linux/printk.h  |  2 --
>  kernel/printk/printk.c  |  8 --------
>  3 files changed, 14 insertions(+), 10 deletions(-)
> 
> diff --git a/include/linux/console.h b/include/linux/console.h
> index dc0df9d9e7d9..3bb5bc62e154 100644
> --- a/include/linux/console.h
> +++ b/include/linux/console.h
> @@ -122,6 +122,20 @@ static inline int con_debug_leave(void)
>  #define CM_ERASE    (2)
>  #define CM_MOVE     (3)
>  
> +#ifdef CONFIG_PRINTK
> +/* The maximum size of a formatted record (i.e. with prefix added per line) */
> +#define CONSOLE_LOG_MAX		1024
> +
> +/* The maximum size for a dropped text message */
> +#define DROPPED_TEXT_MAX	64
> +#else
> +#define CONSOLE_LOG_MAX		0
> +#define DROPPED_TEXT_MAX	0
> +#endif
> +
> +/* The maximum size of an formatted extended record */
> +#define CONSOLE_EXT_LOG_MAX	8192

It seems that all these defines are going to be used only under
kernel/printk/. I would prefer to move them into
kernel/printk/internal.h or another internal header file there.

Any public API can be misused. And these are rather implementation
details.

Best Regards,
Petr