Build regressions/improvements in v3.7-rc5

Geert Uytterhoeven geert at
Tue Nov 13 21:39:13 EST 2012

Hi Scott,

On Mon, Nov 12, 2012 at 10:51 PM, Scott Wood <scottwood at> wrote:
> On 11/12/2012 03:02:46 PM, Geert Uytterhoeven wrote:
>> On Mon, Nov 12, 2012 at 9:58 PM, Geert Uytterhoeven
>> <geert at> wrote:
>> > JFYI, when comparing v3.7-rc5 to v3.7-rc4[3], the summaries are:
>> >   - build errors: +14/-4
>> 14 regressions:
>>   + drivers/virt/fsl_hypervisor.c: error: 'MSR_GS' undeclared (first
>> use in this function):  => 799:93
> These reports would be more useful if the actual .config were provided,
> rather than just saying "powerpc randconfig".

This can be obtained from the kissb build system.
[1] (all 117 configs)

> I doubt this particular one is a regression; it looks like the dependencies

Yeah, regressions in randconfigs can be misleading.
Still, they're build failures.

> have always been too weak (patch sent) and you're just comparing different
> randomly-generated configs.

Thanks for your patch!

>> powerpc-randconfig
>>   + error: relocation truncated to fit: R_PPC64_REL24 against symbol
>> `._mcount' defined in .text section in arch/powerpc/kernel/entry_64.o:
>> (.text+0x1ff9eb8) => (.text+0x1ffa274), (.text+0x1ff7840)
>> powerpc-allyesconfig
> It's been over 3 years since powerpc-allyesconfig built (it's just too big
> for the relocation model the kernel uses) -- how is this a regression?

It's a regression because it didn't complain about ".mcount" in the
previous run.

But I'll start stripping them from the rc-incremental reports.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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