Hi Waiman,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.17-rc2 next-20180426]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Waiman-Long/ipc-Clamp-mni-to-the-real-IPCMNI-limit-increase-that-limit/20180429-175431
config: m68k-stmark2_defconfig (attached as .config)
compiler: m68k-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=m68k 

All errors (new ones prefixed by >>):

   ipc/util.o: In function `sysvipc_find_ipc':
>> util.c:(.text+0x2ca): undefined reference to `ipc_mni'
   ipc/util.o: In function `ipc_addid':
   util.c:(.text+0x448): undefined reference to `ipc_mni'
>> util.c:(.text+0x6d6): undefined reference to `ipc_mni_shift'
   ipc/util.o: In function `ipc_rmid':
   util.c:(.text+0x712): undefined reference to `ipc_mni_shift'
   ipc/util.o: In function `ipc_obtain_object_idr':
   util.c:(.text+0x97c): undefined reference to `ipc_mni_shift'
   ipc/util.o: In function `ipc_obtain_object_check':
   util.c:(.text+0x9f0): undefined reference to `ipc_mni_shift'
   ipc/msg.o: In function `ksys_msgctl':
>> msg.c:(.text+0x4da): undefined reference to `ipc_mni'
   ipc/sem.o: In function `semctl_info.isra.3':
>> sem.c:(.text+0x91c): undefined reference to `ipc_mni'
   ipc/shm.o: In function `ksys_shmctl':
>> shm.c:(.text+0xa36): undefined reference to `ipc_mni'
   shm.c:(.text+0xb0a): undefined reference to `ipc_mni'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation