From: Jeff Garzik <jgarzik@pobox.com>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch 2.4 1/2] backport 2.6 x86 cpu capabilities
Date: Fri, 08 Aug 2003 09:15:03 -0400 [thread overview]
Message-ID: <3F33A257.7050101@pobox.com> (raw)
In-Reply-To: <200308081119.h78BJWQ5015656@harpo.it.uu.se>
Mikael Pettersson wrote:
> On Thu, 7 Aug 2003 22:54:30 -0400, Jeff Garzik wrote:
>
>>(hopefully destined for 2.4.23-pre1)
>>
>>#
>># include/asm-i386/msr.h 1.8 -> 1.9
>># include/asm-i386/cpufeature.h 1.5 -> 1.6
>># arch/i386/kernel/setup.c 1.70 -> 1.71
>>#
>
> ...
>
>>-#define NCAPINTS 4 /* Currently we have 4 32-bit words worth of info */
>>+#define NCAPINTS 6 /* Currently we have 6 32-bit words worth of info */
>
>
> If you change NCAPINTS you also have to change the hardcoded
> struct offset X86_VENDOR_ID in arch/i386/kernel/head.S. Otherwise
> nasty stuff happen at boot since boot_cpu_data gets broken.
hmmm, reality doesn't seem to bear that out... I made the same change
to 2.6, without touching head.S, and life continues without "nasty
stuff" AFAICS.
Do both 2.4 and 2.6 need this change? And, why didn't 2.6 break?
Jeff
next prev parent reply other threads:[~2003-08-08 13:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-08 11:19 [patch 2.4 1/2] backport 2.6 x86 cpu capabilities Mikael Pettersson
2003-08-08 13:15 ` Jeff Garzik [this message]
2003-08-09 9:51 ` Marc-Christian Petersen
-- strict thread matches above, loose matches on Subject: below --
2003-08-10 23:59 Albert Cahalan
2003-08-11 0:28 ` Jeff Garzik
2003-08-08 19:41 Mikael Pettersson
2003-08-09 14:05 ` Jeff Garzik
2003-08-08 2:54 Jeff Garzik
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