linux-kernel - Re: x86 (Linux Tiny): configure out support for some processors

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Message-ID: <3f9a31f40901020813t136ad2ceif1092f312866a0ce@mail.gmail.com>
Date:	Fri, 2 Jan 2009 21:43:03 +0530
From:	"Jaswinder Singh Rajput" <jaswinderlinux@...il.com>
To:	Valdis.Kletnieks@...edu
Cc:	"Ingo Molnar" <mingo@...e.hu>, "Bryan Donlan" <bdonlan@...il.com>,
	"Ingo Brueckl" <ib@...peronline.de>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	"Thomas Gleixner" <tglx@...utronix.de>
Subject: Re: x86 (Linux Tiny): configure out support for some processors

On Fri, Jan 2, 2009 at 9:09 PM,  <Valdis.Kletnieks@...edu> wrote:
> On Fri, 02 Jan 2009 20:40:16 +0530, Jaswinder Singh Rajput said:
>
>> If I know what is my CPU there is no point for supporting all related
>> CPUs in my kernel.
>
> EMBEDDED is for a large assortment of things, all of which are of the form:
>
> General users won't want to change Y, but if I know I don't need Y, there is
> no point in supporting Y in the kernel.
>

On 64 bit AMD machine I was getting :
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls

By using the following patch I get rid of extra CPU support and also
reduces size of the kernel.

Let me know why should I choose EMBEDDED option ? I know I am not
using Embbeded machine and I do not need embbeded features on my
machine. If I am willing to go North why should I go South first ?

--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -411,7 +411,7 @@ config X86_DEBUGCTLMSR
        depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII ||
M586MMX || M586TSC || M586 || M486 || M386)

 menuconfig PROCESSOR_SELECT
-       bool "Supported processor vendors" if EMBEDDED
+       bool "Supported processor vendors"
        help
          This lets you choose what x86 vendor support code your kernel
          will include.
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