linux-kernel - Re: [tip:x86/debug] x86: Minimise printk spew from per-vendor init code

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Message-ID: <86802c440911131703y35520496pfbdaa4e0bd8f8609@mail.gmail.com>
Date:	Fri, 13 Nov 2009 17:03:44 -0800
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, davej@...hat.com, mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/debug] x86: Minimise printk spew from per-vendor init 
	code

On Fri, Nov 13, 2009 at 4:33 PM, tip-bot for Dave Jones
<davej@...hat.com> wrote:
> Commit-ID:  0388423dba2217b4e5b6c61690b0506d13b25a49
> Gitweb:     http://git.kernel.org/tip/0388423dba2217b4e5b6c61690b0506d13b25a49
> Author:     Dave Jones <davej@...hat.com>
> AuthorDate: Fri, 13 Nov 2009 15:30:00 -0500
> Committer:  Ingo Molnar <mingo@...e.hu>
> CommitDate: Sat, 14 Nov 2009 01:18:05 +0100
>
> x86: Minimise printk spew from per-vendor init code
>
> In the default case where the kernel supports all CPU vendors,
> we currently print out a bunch of not useful messages on every
> system.
>
> 32-bit:
> KERNEL supported cpus:
>  Intel GenuineIntel
>  AMD AuthenticAMD
>  NSC Geode by NSC
>  Cyrix CyrixInstead
>  Centaur CentaurHauls
>  Transmeta GenuineTMx86
>  Transmeta TransmetaCPU
>  UMC UMC UMC UMC
>
> 64-bit:
> KERNEL supported cpus:
>  Intel GenuineIntel
>  AMD AuthenticAMD
>  Centaur CentaurHauls
>
> Given that "what CPUs does the kernel support" isn't useful for
> the "support everything" case, we can suppress these printk's.
>
> Signed-off-by: Dave Jones <davej@...hat.com>
> LKML-Reference: <20091113203000.GA19160@...hat.com>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
>  arch/x86/kernel/cpu/common.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> index cc25c2b..617a29f 100644
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -656,6 +656,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
>
>  void __init early_cpu_init(void)
>  {
> +#ifdef PROCESSOR_SELECT
>        const struct cpu_dev *const *cdev;
>        int count = 0;
>
> @@ -676,7 +677,7 @@ void __init early_cpu_init(void)
>                                cpudev->c_ident[j]);
>                }
>        }
> -
> +#endif
>        early_identify_cpu(&boot_cpu_data);
>  }

NACK.

the function is initializing cpu_devs array.

YH
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