[PATCH] powerpc: enforce a non-spe kernel build even on broken compilers

[Kumar Gala]

On Oct 15, 2008, at 9:43 AM, Sebastian Andrzej Siewior wrote:

> * 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.
> -- 
>
> With this patch it compiles and boots fine.
> The option -mabi=no-spe is not required.

ok.  can post a clean patch w/just this change.

- k