Re: [PATCH] mm/migrate: Mark unmap_and_move() "noinline" to avoid ICE in gcc 4.7.3

[Geert Uytterhoeven <geert@linux-m68k.org>]

Hi Russell,

On Wed, Apr 1, 2015 at 11:59 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Wed, Apr 01, 2015 at 02:54:59PM -0700, Kevin Hilman wrote:
>> Your patch on top of Geert's still compiles fine for me with gcc-4.7.3.
>> However, I'm not sure how specific we can be on the versions.
>>
>> /me goes to test a few more compilers...   OK...
>>
>> ICE: 4.7.1, 4.7.3, 4.8.3
>> OK: 4.6.3, 4.9.2, 4.9.3
>>
>> The diff below[2] on top of yours compiles fine here and at least covers
>> the compilers I *know* to trigger the ICE.
>
> Interesting.  I'm using stock gcc 4.7.4 here, though I'm not building
> -next (only mainline + my tree + arm-soc) and it hasn't shown a problem
> yet.

Mainline doesn't fail.

> I think we need to ask the question: is the bug in stock GCC or Linaro
> GCC?  If it's not in stock GCC, then it's a GCC vendor problem :)

Can you please try -next (e.g. next-20150320)?

make bockw_defconfig
make mm/migrate.o

Thanks!

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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