linux-kernel - Re: [PATCH v11 5/5] x86/earlyprintk: Patch for testing earlyprintk

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Date:	Tue, 09 Jun 2015 18:30:18 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Alexander Kuleshov <kuleshovmail@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Borislav Petkov <bp@...e.de>,
	Mark Rustad <mark.d.rustad@...el.com>,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH v11 5/5] x86/earlyprintk: Patch for testing earlyprintk

On Tue, 2015-06-09 at 17:11 +0600, Alexander Kuleshov wrote:
> Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>

Please, mark those patches as something like "[NOT TO APPLY]".

Or you may (if others have no objections) create a configuration option
like CONFIG_TEST_EARLY_PRINTK and make this patch upstreamable.
See below.

> ---
>  arch/x86/kernel/head64.c | 1 +
>  arch/x86/kernel/setup.c  | 1 +
>  init/main.c              | 2 +-
>  3 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
> index 041be2c..1d1d167 100644
> --- a/arch/x86/kernel/head64.c
> +++ b/arch/x86/kernel/head64.c
> @@ -204,5 +204,6 @@ void __init x86_64_start_reservations(char *real_mode_data)
>  
>  	reserve_ebda_region();
>  
> +	early_printk("Go on the start_kernel\n");

#ifdef CONFIG_TEST_EARLY_PRINTK
early_printk("%s: Starting kernel...\n", __func__);
#endif

>  	start_kernel();
>  }
> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index edfdb6a..22e8f39 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -876,6 +876,7 @@ void __init setup_builtin_cmdline(void)
>  
>  void __init setup_arch(char **cmdline_p)
>  {
> +	early_printk("Now setup arch is working\n");

#ifdef CONFIG_TEST_EARLY_PRINTK
early_printk("%s: Enter\n", __func__);
#endif

>  	memblock_reserve(__pa_symbol(_text),
>  			 (unsigned long)__bss_stop - (unsigned long)_text);
>  
> diff --git a/init/main.c b/init/main.c
> index 2115055..79087b8 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -493,7 +493,7 @@ asmlinkage __visible void __init start_kernel(void)
>  {
>  	char *command_line;
>  	char *after_dashes;
> -

This removal is wrong. Leave empty string after definition block.

> +	early_printk("start_kernel function started to work\n");

#ifdef CONFIG_TEST_EARLY_PRINTK
early_printk("%s: Enter\n", __func__);
#endif

>  	/*
>  	 * Need to run as early as possible, to initialize the
>  	 * lockdep hash:


-- 
Andy Shevchenko <andriy.shevchenko@...el.com>
Intel Finland Oy

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