Re: [akpm-mm:mm-new 123/137] arch/s390/mm/mmap.c:188:3: error: call to undeclared function 'mm_flag_set'; ISO C99 and later do not support implicit function declarations

[Lorenzo Stoakes <lorenzo.stoakes@oracle.com>]

On Wed, Aug 13, 2025 at 09:34:15PM +0800, kernel test robot wrote:
> Hi Lorenzo,
>
> FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
> head:   694c8e78f486b09137ee3efadae044d01aba971b
> commit: 70fd92efa9e96967353bb39665bac8f5276aaaae [123/137] mm: convert arch-specific code to mm_flags_*() accessors
> config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20250813/202508132154.feFNDPyq-lkp@intel.com/config)
> compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 3769ce013be2879bf0b329c14a16f5cb766f26ce)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250813/202508132154.feFNDPyq-lkp@intel.com/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 <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202508132154.feFNDPyq-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> >> arch/s390/mm/mmap.c:188:3: error: call to undeclared function 'mm_flag_set'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>      188 |                 mm_flag_set(MMF_TOPDOWN, mm);

Oops I typo'd this! Apologies. should be mm_flags_set().

Will send a fixpatch.