From patchwork Wed Oct 15 14:43:59 2008
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Date: Wed, 15 Oct 2008 16:43:59 +0200
From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
To: Kumar Gala <galak@kernel.crashing.org>
Subject: Re: [PATCH] powerpc: enforce a non-spe kernel build even on broken
	compilers
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* Kumar Gala | 2008-10-15 08:25:54 [-0500]:

>
> On Oct 15, 2008, at 3:59 AM, Sebastian Andrzej Siewior wrote:
>
>> * Sebastian Andrzej Siewior | 2008-10-15 00:49:46 [+0200]:
>>
>>>> is the -mabi=no-spe really needed?
>>> It seems to work the other way around (without -mabi=no-spe but with
>>> -mabi=no-spe) alteast I did not find anything in do_syslog() or while
>>> browsing through the dissasm. I do a boot check tomorrow.
>>
>> Okay. I recompiled with -mspe=no and was able to boot without trouble.
>> It didn't work with -mabi=no-spe.
>
> I'm confused.. what did you change from your patch?

This is the patch it right now:

--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -103,6 +103,7 @@ KBUILD_CFLAGS += $(call cc-option,-mno-altivec)

 # No SPE instruction when building kernel
 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
+KBUILD_CFLAGS += $(call cc-option,-mspe=no)

 # Enable unit-at-a-time mode when possible. It shrinks the
 # kernel considerably.