Re: [linux-next:master 2148/2944] lib/find_bit_benchmark.c:115:7: error: implicit declaration of function 'find_next_and_bit'; did you mean 'find_next_bit'?

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

Hi Andrew,

On Wed, Dec 6, 2017 at 1:09 AM, Andrew Morton <akpm@linux-foundation.org> wrote:
> On Tue, 5 Dec 2017 20:31:28 +0800 kbuild test robot <fengguang.wu@intel.com> wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
>> head:   7ceb97a071e80f1b5e4cd5a36de135612a836388
>> commit: e49c614e6b37254b1e7bf55c631ce3cb5e3b6433 [2148/2944] lib: optimize cpumask_next_and()
>> config: m68k-allmodconfig (attached as .config)
>> compiler: m68k-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
>> reproduce:
>>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>         chmod +x ~/bin/make.cross
>>         git checkout e49c614e6b37254b1e7bf55c631ce3cb5e3b6433
>>         # save the attached .config to linux build tree
>>         make.cross ARCH=m68k
>>
>> All errors (new ones prefixed by >>):
>>
>>    lib/find_bit_benchmark.c: In function 'test_find_next_and_bit':
>> >> lib/find_bit_benchmark.c:115:7: error: implicit declaration of function 'find_next_and_bit'; did you mean 'find_next_bit'? [-Werror=implicit-function-declaration]
>>       i = find_next_and_bit(bitmap, bitmap2, BITMAP_LEN, i+1);
>>           ^~~~~~~~~~~~~~~~~
>>           find_next_bit
>>    cc1: some warnings being treated as errors
>
> For some reason m68k doesn't include asm-generic/bitops/find.h from
> arch/m68k/include/asm/bitops.h.  One for Clement and Geert to puzzle
> out, please.

Oh it does, but only for the CONFIG_CPU_HAS_NO_BITFIELDS=y case.
Which used to be fine, as the code for CONFIG_CPU_HAS_NO_BITFIELDS=n
implemented everything in find.h, until find_next_and_bit() was added.

Thanks, will fix...

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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