linux-kernel - Re: [PATCH] bootconfig: Change message if no bootconfig with CONFIG_BOOT_CONFIG

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Message-ID: <20230228050109.GO2948950@paulmck-ThinkPad-P17-Gen-1>
Date:   Mon, 27 Feb 2023 21:01:09 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc:     linux-trace-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        ndesaulniers@...gle.com, vbabka@...e.cz, hannes@...xchg.org,
        joel@...lfernandes.org, quic_neeraju@...cinc.com, urezki@...il.com
Subject: Re: [PATCH] bootconfig: Change message if no bootconfig with
 CONFIG_BOOT_CONFIG_FORCE=y

On Tue, Feb 28, 2023 at 10:01:42AM +0900, Masami Hiramatsu (Google) wrote:
> From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> 
> Change no bootconfig data error message if user do not specify 'bootconfig'
> option but CONFIG_BOOT_CONFIG_FORCE=y.
> With CONFIG_BOOT_CONFIG_FORCE=y, the kernel proceeds bootconfig check even
> if user does not specify 'bootconfig' option. So the current error message
> is confusing. Let's show just an information message to notice skipping
> the bootconfig in that case.
> 
> Fixes: b743852ccc1d ("Allow forcing unconditional bootconfig processing")
> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Link: https://lore.kernel.org/all/CAMuHMdV9jJvE2y8gY5V_CxidUikCf5515QMZHzTA3rRGEOj6=w@mail.gmail.com/
> Suggested-by: Paul E. McKenney <paulmck@...nel.org>
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Tested-by: Paul E. McKenney <paulmck@...nel.org>

> ---
>  init/main.c |   10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/init/main.c b/init/main.c
> index 4425d1783d5c..bb87b789c543 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -156,7 +156,7 @@ static char *extra_init_args;
>  
>  #ifdef CONFIG_BOOT_CONFIG
>  /* Is bootconfig on command line? */
> -static bool bootconfig_found = IS_ENABLED(CONFIG_BOOT_CONFIG_FORCE);
> +static bool bootconfig_found;
>  static size_t initargs_offs;
>  #else
>  # define bootconfig_found false
> @@ -429,7 +429,7 @@ static void __init setup_boot_config(void)
>  	err = parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL,
>  			 bootconfig_params);
>  
> -	if (IS_ERR(err) || !bootconfig_found)
> +	if (IS_ERR(err) || !(bootconfig_found || IS_ENABLED(CONFIG_BOOT_CONFIG_FORCE)))
>  		return;
>  
>  	/* parse_args() stops at the next param of '--' and returns an address */
> @@ -437,7 +437,11 @@ static void __init setup_boot_config(void)
>  		initargs_offs = err - tmp_cmdline;
>  
>  	if (!data) {
> -		pr_err("'bootconfig' found on command line, but no bootconfig found\n");
> +		/* If user intended to use bootconfig, show an error level message */
> +		if (bootconfig_found)
> +			pr_err("'bootconfig' found on command line, but no bootconfig found\n");
> +		else
> +			pr_info("No bootconfig data provided, so skipping bootconfig");
>  		return;
>  	}
>  
>