linux-kernel - Re: [PATCH 4/7] [RFC] enable L1

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Date:	Thu, 19 May 2011 07:53:34 -0500
From:	Eric Van Hensbergen <ericvh@...il.com>
To:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	bg-linux@...ts.anl-external.org
Subject: Re: [PATCH 4/7] [RFC] enable L1_WRITETHROUGH mode for BG/P

On Thu, May 19, 2011 at 5:43 AM, Josh Boyer <jwboyer@...ux.vnet.ibm.com> wrote:
> On Wed, May 18, 2011 at 04:24:52PM -0500, Eric Van Hensbergen wrote:
>>
>>+config L1_WRITETHROUGH
>>+      bool "Blue Gene/P enabled writethrough mode"
>>+      depends on BGP
>>+      default y
>
> You add this config option here, named generically, but then make it
> depend on BGP.  It sees it should be named BGP_L1_WRITETHROUGH, and then
> just selected by the BGP platform.  But then....
>
>> endmenu
>>diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
>>index 111138c..3a3c711 100644
>>--- a/arch/powerpc/platforms/Kconfig.cputype
>>+++ b/arch/powerpc/platforms/Kconfig.cputype
>>@@ -329,9 +329,13 @@ config NOT_COHERENT_CACHE
>>       bool
>>       depends on 4xx || 8xx || E200 || PPC_MPC512x || GAMECUBE_COMMON
>>       default n if PPC_47x
>>+      default n if BGP
>>       default y
>>
>> config CHECK_CACHE_COHERENCY
>>       bool
>>
>>+config L1_WRITETHROUGH
>>+      bool
>
> You add an identical option down here.  Confused.
>

Yeah, this was copied from the original patches and it confused me as
well, but I had never
modified Kconfig.cputype before so I wasn't sure if there were some
weird rules.  I'm happy
to remove the vestigial one and make the changes you suggest to make
the naming BGP
specific.

         -eric
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