[android-omap:android-beagle-x15-4.14 16613/30000] <stdin>:1335:2: warning: #warning syscall pidfd_open not implemented

[android-omap:android-beagle-x15-4.14 16613/30000] <stdin>:1335:2: warning: #warning syscall pidfd_open not implemented

[kernel test robot]

tree:   https://android.googlesource.com/kernel/omap android-beagle-x15-4.14
head:   bb5a46d9a30e6126b85ef4cf108499488c438462
commit: 708c2df8cdb7956cfcf54aa48dfd3e8177a3a3f0 [16613/30000] BACKPORT: arch: wire-up pidfd_open()
config: powerpc-allnoconfig (https://download.01.org/0day-ci/archive/20230302/202303021329.w8Inmrfx-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 7.5.0
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
        git remote add android-omap https://android.googlesource.com/kernel/omap
        git fetch --no-tags android-omap android-beagle-x15-4.14
        git checkout 708c2df8cdb7956cfcf54aa48dfd3e8177a3a3f0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross W=1 O=build_dir ARCH=powerpc prepare

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303021329.w8Inmrfx-lkp@intel.com/

All warnings (new ones prefixed by >>):

   <stdin>:1332:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
>> <stdin>:1335:2: warning: #warning syscall pidfd_open not implemented [-Wcpp]
--
   <stdin>:1332:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
>> <stdin>:1335:2: warning: #warning syscall pidfd_open not implemented [-Wcpp]

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests