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Re: [Xen-devel] Re: Allow compile with CONFIG_DEBUG_INFO=y, X86_PAE not

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] Re: Allow compile with CONFIG_DEBUG_INFO=y, X86_PAE not set on gcc 3.4.5
From: Adrian Bunk <bunk@xxxxxxxxxx>
Date: Fri, 8 Aug 2008 21:37:11 +0300
Cc: Mark McLoughlin <markmc@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Eduardo Habkost <ehabkost@xxxxxxxxxx>, Stephen Tweedie <sct@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Simon Horman <horms@xxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx>
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On Fri, Aug 08, 2008 at 11:01:30AM -0700, Jeremy Fitzhardinge wrote:
> Adrian Bunk wrote:
>> On Fri, Aug 08, 2008 at 08:21:41AM -0700, Jeremy Fitzhardinge wrote:
>>> Adrian Bunk wrote:
>>>> CONFIG_DEBUG_INFO=y is why I never hit it before.
>>>> It does not seem to be just one dodgy Redhat compiler (as I assumed 
>>>> in  the Bugzilla entry) but the whole 3.4 series of gcc which makes 
>>>> our  resolution of saying that this specific compiler is broken 
>>>> invalid.
>>>> Considering that we officially support all compilers >= 3.2 this is 
>>>> just one more case where we have to add to the kernel a workaround 
>>>> for a broken compiler.
>>> Yes.  I'm happy to write off a specific rpm package, but a whole 
>>> series  is a different matter.
>>> Adding
>>>     if (PREALLOCATED_PMDS == 0)
>>>             return;
>>> in the appropriate places with a small comment seems like the right answer.
>> The patch below you suggested fixes it for me with gcc 3.4.6.
>>>    J
>> cu
>> Adrian
> OK.  Want to submit this as a proper patch?

No, it's your patch.  :-)

> Thanks,
>    J



       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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