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

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Date:	Sat, 14 Nov 2009 10:38:06 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, davej@...hat.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/debug] x86: Minimise printk spew from per-vendor init
 code


* Yinghai Lu <yhlu.kernel@...il.com> wrote:

> 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.

Good point. I fixed this.

	Ingo
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