Re: [PATCH -mm 2/2] mm: page_idle: split 32bit page_idle's flag from the common flags

[Yafang Shao <laoar.shao@gmail.com>]

On Sat, Dec 17, 2022 at 8:46 PM kernel test robot <lkp@intel.com> wrote:
>
> Hi Yafang,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on akpm-mm/mm-everything]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Yafang-Shao/mm-page_ext-split-page_ext-flags/20221217-190044
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/20221217105833.24851-3-laoar.shao%40gmail.com
> patch subject: [PATCH -mm 2/2] mm: page_idle: split 32bit page_idle's flag from the common flags
> config: arc-randconfig-r001-20221217
> compiler: arceb-elf-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/intel-lab-lkp/linux/commit/b2ccea224a74e091007c4c772b78b8163bb11b6c
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Yafang-Shao/mm-page_ext-split-page_ext-flags/20221217-190044
>         git checkout b2ccea224a74e091007c4c772b78b8163bb11b6c
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
>    arceb-elf-ld: mm/filemap.o: in function `get_page_idle':
>    include/linux/page_idle.h:24: undefined reference to `page_idle_ops'
> >> arceb-elf-ld: include/linux/page_idle.h:24: undefined reference to `page_idle_ops'
>    arceb-elf-ld: mm/swap.o: in function `get_page_idle':
>    include/linux/page_idle.h:24: undefined reference to `page_idle_ops'
> >> arceb-elf-ld: include/linux/page_idle.h:24: undefined reference to `page_idle_ops'
>    arceb-elf-ld: mm/rmap.o: in function `get_page_idle':
>    include/linux/page_idle.h:24: undefined reference to `page_idle_ops'
>    arceb-elf-ld: mm/rmap.o:include/linux/page_idle.h:24: more undefined references to `page_idle_ops' follow
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp

Ah, because of  CONFIG_IDLE_PAGE_TRACKING=n, and mm/page_idle.c is for
page_idle_tracking only but not for  page_idle_flag ...
Will update it in the next version.
Thanks for the report.

-- 
Regards
Yafang