Re: [davidhildenbrand:get_dummy 14/21] include/linux/pgtable.h:2351:13: error: implicit declaration of function 'mm_pmd_folded'

Hi,

> Hi Yeoreum,
> 
> FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
> 
> tree:   https://github.com/davidhildenbrand/linux get_dummy
> head:   112a153a97494becabd764fe6257578ba908801f
> commit: db92928e80f5332bbfca9a70beaef62d46a0c9de [14/21] x86: mm: carve out the generic compile-time folded pgtable case in effective_prot()
> config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20260827/[email protected]/config)
> compiler: m68k-linux-gcc (GCC) 16.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260827/[email protected]/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <[email protected]>
> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from include/linux/mm.h:31,
>                     from include/linux/cpuset.h:17,
>                     from kernel/sched/sched.h:33,
>                     from kernel/sched/rq-offsets.c:5:
>    include/linux/pgtable.h: In function 'mm_first_pgtable_level':
> >> include/linux/pgtable.h:2351:13: error: implicit declaration of function 'mm_pmd_folded' [-Wimplicit-function-declaration]
>     2351 |         if (mm_pmd_folded(mm))
>          |             ^~~~~~~~~~~~~
> >> include/linux/pgtable.h:2353:13: error: implicit declaration of function 'mm_pud_folded' [-Wimplicit-function-declaration]
>     2353 |         if (mm_pud_folded(mm))
>          |             ^~~~~~~~~~~~~
> >> include/linux/pgtable.h:2355:13: error: implicit declaration of function 'mm_p4d_folded' [-Wimplicit-function-declaration]
>     2355 |         if (mm_p4d_folded(mm))
>          |             ^~~~~~~~~~~~~
>    make[3]: *** [scripts/Makefile.build:184: kernel/sched/rq-offsets.s] Error 1
>    make[3]: Target 'prepare' not remade because of errors.
>    make[2]: *** [Makefile:1410: prepare0] Error 2
>    make[2]: Target 'prepare' not remade because of errors.
>    make[1]: *** [Makefile:248: __sub-make] Error 2
>    make[1]: Target 'prepare' not remade because of errors.
>    make: *** [Makefile:248: __sub-make] Error 2
>    make: Target 'prepare' not remade because of errors.

This is known issue and fixed at internal review version 6.

Thanks!

[..snipped..]

-- 
Sincerely,
Yeoreum Yun