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

[Pavel Tatashin]

Hi Geert,

The fix is here:
https://lore.kernel.org/linux-mm/CA+CK2bBjC8=cRsL5VhWkcevPsqSXWhsANVjsFNMERLT8vWtiQw@xxxxxxxxxxxxxx/

Thank you,
Pasha

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