Re: [PATCH 1/1] mm: introduce process_reap system call

[Suren Baghdasaryan <surenb@google.com>]

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On Thu, Jun 24, 2021 at 5:06 AM kernel test robot <lkp@intel.com> wrote:
>
> Hi Suren,
>
> I love your patch! Yet something to improve:
>
> [auto build test ERROR on arm64/for-next/core]
> [also build test ERROR on tip/x86/asm linus/master v5.13-rc7]
> [cannot apply to hnaz-linux-mm/master next-20210623]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url:    https://github.com/0day-ci/linux/commits/Suren-Baghdasaryan/mm-introduce-process_reap-system-call/20210624-032923
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
> config: arm-randconfig-s032-20210622 (attached as .config)
> compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # apt-get install sparse
>         # sparse version: v0.6.3-341-g8af24329-dirty
>         # https://github.com/0day-ci/linux/commit/64bd00602e706bc1b2e2267ca1434646c0900fa1
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Suren-Baghdasaryan/mm-introduce-process_reap-system-call/20210624-032923
>         git checkout 64bd00602e706bc1b2e2267ca1434646c0900fa1
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arm
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
>    arm-linux-gnueabi-ld: mm/oom_kill.o: in function `__se_sys_process_reap':
> >> oom_kill.c:(.text+0x157e): undefined reference to `__oom_reap_task_mm'

Thanks kernel test robot! I missed that __oom_reap_task_mm is
undefined when CONFIG_MMU=n. Will fix it in the next revision. I think
returning -ENOSYS in this case would be appropriate for the syscall.

>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org