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Re: Build regressions/improvements in v4.6-rc4

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  Re: Build regressions/improvements in v4.6-rc4 Geert Uytterhoeven <geert@linux-m68k.org> - 2016-04-19 09:00 +0200
    Re: Build regressions/improvements in v4.6-rc4 (parisc warnings) Helge Deller <deller@gmx.de> - 2016-04-19 15:40 +0200

#1382210 — Re: Build regressions/improvements in v4.6-rc4

On Tue, Apr 19, 2016 at 8:53 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> Below is the list of build error/warning regressions/improvements in
> v4.6-rc4[1] compared to v4.5[2].
>
> Summarized:
>   - build errors: +11/-7
>   - build warnings: +16376/-165

Sorry for the delay, initially I didn't realize why my first report didn't make
it to the list. It was too big, due to 16211 warnings in parisc-allmodconfig
about "-ffunction-sections disabled; it makes profiling impossible [enabled by
default]".

> JFYI, when comparing v4.6-rc4[1] to v4.6-rc3[3], the summaries are:
>   - build errors: +9/-9

  + /home/kisskb/slave/src/arch/powerpc/kernel/pci_dn.c: error:
'struct pci_dn' has no member named 'edev':  => 272:8
  + /home/kisskb/slave/src/arch/powerpc/kernel/pci_dn.c: error:
dereferencing pointer to incomplete type:  => 215:7
  + /home/kisskb/slave/src/arch/powerpc/kernel/pci_dn.c: error:
implicit declaration of function 'eeh_dev_init'
[-Werror=implicit-function-declaration]:  => 212:3

powerpc-randconfig

  + /home/kisskb/slave/src/drivers/thermal/mtk_thermal.c: error:
implicit declaration of function 'device_reset'
[-Werror=implicit-function-declaration]:  => 560:2

x86_64-randconfig (patch available)

> [1] http://kisskb.ellerman.id.au/kisskb/head/10194/ (all 262 configs)
> [3] http://kisskb.ellerman.id.au/kisskb/head/10162/ (all 262 configs)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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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#1382520 — Re: Build regressions/improvements in v4.6-rc4 (parisc warnings)

Hi Geert,

On 19.04.2016 08:57, Geert Uytterhoeven wrote:
> On Tue, Apr 19, 2016 at 8:53 AM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
>> Below is the list of build error/warning regressions/improvements in
>> v4.6-rc4[1] compared to v4.5[2].
>>
>> Summarized:
>>   - build errors: +11/-7
>>   - build warnings: +16376/-165 <tel:+16376165>
> 
> Sorry for the delay, initially I didn't realize why my first report didn't make
> it to the list. It was too big, due to 16211 warnings in parisc-allmodconfig
> about "-ffunction-sections disabled; it makes profiling impossible [enabled by
> default]".

I checked the parisc warnings, and looking at http://kisskb.ellerman.id.au/kisskb/buildresult/12665382/
it seems a gcc-4.6 (/opt/cross/gcc-4.6.3-nolibc/hppa-linux/bin/hppa-linux-gcc) compiler
is still being used.
I tend to think, that gcc-4.6 wasn't able to generate function sections
which is why we see those warnings now (there was a FTRACE patch from me 
included before v4.6-rc4). 
Anyway, I can't reproduce those warnings with gcc-4.8 and higher.
Given the fact, that we even switched on debian now to use gcc-5 for the kernel, can
someone please update the 32- and 64-bit parisc compilers on the kiss
infrastructure to at least gcc-4.8 (gcc-4.9 or gcc-5 being preferred).

Thanks,
Helge

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