Re: linux-next: build failure after merge of the akpm-current tree

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Hi Pavel,

On Tue, Feb 2, 2021 at 1:34 PM Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> wrote:
> The fix is here:
> https://lore.kernel.org/linux-mm/CA+CK2bBjC8=cRsL5VhWkcevPsqSXWhsANVjsFNMERLT8vWtiQw@xxxxxxxxxxxxxx/

Thanks, that fixed the m68k/m5272c3_defconfig build.

> On Tue, Feb 2, 2021 at 5:35 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> > On Tue, Feb 2, 2021 at 10:13 AM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > > After merging the akpm-current tree, today's linux-next build (x86_64
> > > allnoconfig) failed like this:
> > >
> > > In file included from arch/x86/include/asm/page.h:76,
> > >                  from arch/x86/include/asm/thread_info.h:12,
> > >                  from include/linux/thread_info.h:56,
> > >                  from arch/x86/include/asm/preempt.h:7,
> > >                  from include/linux/preempt.h:78,
> > >                  from include/linux/spinlock.h:51,
> > >                  from include/linux/mmzone.h:8,
> > >                  from include/linux/gfp.h:6,
> > >                  from include/linux/slab.h:15,
> > >                  from include/linux/crypto.h:20,
> > >                  from arch/x86/kernel/asm-offsets.c:9:
> > > include/linux/mm.h: In function 'is_pinnable_page':
> > > include/asm-generic/memory_model.h:64:14: error: implicit declaration of function 'page_to_section'; did you mean 'present_section'? [-Werror=implicit-function-declaration]
> > >    64 |  int __sec = page_to_section(__pg);   \
> > >       |              ^~~~~~~~~~~~~~~
> > > include/asm-generic/memory_model.h:81:21: note: in expansion of macro '__page_to_pfn'
> > >    81 | #define page_to_pfn __page_to_pfn
> > >       |                     ^~~~~~~~~~~~~
> > > include/linux/mm.h:1134:15: note: in expansion of macro 'page_to_pfn'
> > >  1134 |   is_zero_pfn(page_to_pfn(page));
> > >       |               ^~~~~~~~~~~
> >
> > In addition, noreply@xxxxxxxxxxxxxx reports for m68k/m5272c3_defconfig:
> >
> >     include/linux/mm.h:1133:3: error: implicit declaration of function
> > 'is_zero_pfn'; did you mean 'is_zero_ino'?
> > [-Werror=implicit-function-declaration]
> >
> > is_zero_pfn() is only defined if CONFIG_MMU=y.
> >
> > Hence using it in mm/gup.c in commit 3f509f6aef4bb868 ("mm/gup: migrate
> > pinned pages out of movable zone") breaks compilation of gup.c, too.

Gr{oetje,eeting}s,

                        Geert

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

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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